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Wang S, Li Y, Chen Y, Gao Y, Zhang Z, Wang A. Femtosecond all-polarization-maintaining Nd fiber laser at 920 nm mode locked by a biased NALM. OPTICS EXPRESS 2021; 29:38199-38205. [PMID: 34808877 DOI: 10.1364/oe.434767] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
We demonstrate a femtosecond all-polarization-maintaining Nd fiber laser working at 920 nm mode locked by a biased non-linear loop mirror. The broadest spectral width of the pulse is 25.2 nm and the output power is 8 mW with 320 mW pump power. The measured pulse width is 109 fs with extra-cavity compression. The laser configuration of all-polarization-maintaining fiber can directly enhance the environmental stability of generated pulses. The seed pulses of the oscillator were amplified over 400 mW, which served as the light source for a two-photon microscope. To the best of our knowledge, this is the first demonstration of a 920 nm femtosecond Nd polarization-maintaining fiber laser based on a non-linear loop mirror.
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2
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Wang Y, Hou S, Yu Y, Liu W, Yan P, Yang J. Photonic device combined optical microfiber coupler with saturable-absorption materials and its application in mode-locked fiber laser. OPTICS EXPRESS 2021; 29:20526-20534. [PMID: 34266140 DOI: 10.1364/oe.426654] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Accepted: 06/03/2021] [Indexed: 06/13/2023]
Abstract
We demonstrated a mode-locked fiber laser based on a novel photonic device that combined optical microfiber coupler (OMC) and saturable absorption materials. The stable ultrafast laser was formed based on the interaction between the deposited Indium Antimonide (InSb) and the evanescent field on OMC. Different from optical microfiber (OM), OMC can directly output the mode-locked laser without additional beam splitting devices, which further improves the integrated characteristics of the fiber laser. The pulse duration of the output pulse is 405 fs at the central wavelength of 1560 nm. To the best of our knowledge, this is the first time that optical microfiber coupler based saturable absorber (OMC-SA) for mode-locked fiber laser is demonstrated.
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3
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Becheker R, Tang M, Touil M, Robin T, Cadier B, Laroche M, Godin T, Hideur A. Dissipative soliton resonance in a mode-locked Nd-fiber laser operating at 927 nm. OPTICS LETTERS 2019; 44:5497-5500. [PMID: 31730092 DOI: 10.1364/ol.44.005497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 10/14/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate for the first time, to our knowledge, an all-polarization-maintaining double-clad neodymium fiber laser operating in the dissipative soliton resonance (DSR) regime where stable mode-locking is achieved using a nonlinear amplifying loop mirror (NALM) with large normal dispersion in a figure-8 cavity design. The laser thereby generates square-shaped nanosecond pulses whose duration linearly scales with pump power from 0.5 up to 6 ns, with a maximum energy of 20 nJ. In addition, output pulses feature a remarkably narrow bandwidth of 60 pm along with a signal-to-noise ratio higher than 80 dB. This study then paves the way toward using such DSR-based sources for efficient frequency doubling in the blue spectral range.
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4
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Wang T, Wang J, Wu J, Ma P, Su R, Ma Y, Zhou P. Near-Infrared Optical Modulation for Ultrashort Pulse Generation Employing Indium Monosulfide (InS) Two-Dimensional Semiconductor Nanocrystals. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E865. [PMID: 31181606 PMCID: PMC6630692 DOI: 10.3390/nano9060865] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 05/30/2019] [Accepted: 06/03/2019] [Indexed: 11/25/2022]
Abstract
In recent years, metal chalcogenide nanomaterials have received much attention in the field of ultrafast lasers due to their unique band-gap characteristic and excellent optical properties. In this work, two-dimensional (2D) indium monosulfide (InS) nanosheets were synthesized through a modified liquid-phase exfoliation method. In addition, a film-type InS-polyvinyl alcohol (PVA) saturable absorber (SA) was prepared as an optical modulator to generate ultrashort pulses. The nonlinear properties of the InS-PVA SA were systematically investigated. The modulation depth and saturation intensity of the InS-SA were 5.7% and 6.79 MW/cm2, respectively. By employing this InS-PVA SA, a stable, passively mode-locked Yb-doped fiber laser was demonstrated. At the fundamental frequency, the laser operated at 1.02 MHz, with a pulse width of 486.7 ps, and the maximum output power was 1.91 mW. By adjusting the polarization states in the cavity, harmonic mode-locked phenomena were also observed. To our knowledge, this is the first time an ultrashort pulse output based on InS has been achieved. The experimental findings indicate that InS is a viable candidate in the field of ultrafast lasers due to its excellent saturable absorption characteristics, which thereby promotes the ultrafast optical applications of InX (X = S, Se, and Te) and expands the category of new SAs.
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Affiliation(s)
- Tao Wang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Jin Wang
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Jian Wu
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Pengfei Ma
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Rongtao Su
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Yanxing Ma
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
| | - Pu Zhou
- College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China.
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Liu B, Gao L, Cheng WW, Tang XS, Gao C, Cao YL, Li YJ, Zhu T. 1.6 μm dissipative soliton fiber laser mode-locked by cesium lead halide perovskite quantum dots. OPTICS EXPRESS 2018; 26:7155-7162. [PMID: 29609402 DOI: 10.1364/oe.26.007155] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/04/2018] [Indexed: 06/08/2023]
Abstract
We demonstrate a stable, picosecond fiber laser mode-locked by cesium lead halide perovskite quantum dots (CsPbBr3-QDs). The saturable absorber is produced by depositing the CsPbBr3-QDs nanocrystals onto the endface of a fiber ferrule through light pressure. A balanced two-detector measurement shows that it has a modulation depth of 2.5% and a saturation power of 17.29 MW/cm2. After incorporating the fabricated device into an Er3+-doped fiber ring cavity with a net normal dispersion of 0.238 ps2, we obtain stable dissipative soliton with a pulse duration of 14.4 ps and a center wavelength at 1600 nm together with an edge-to-dege bandwidth of 4.5 nm. The linear chirped phase can be compensated by 25 m single mode fiber, resulting into a compressed pulse duration of 1.046 ps. This experimental works proves that such CsPbBr3-QDs materials are effective choice for ultrafast laser operating with devious mode-locking states.
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Li D, Jussila H, Wang Y, Hu G, Albrow-Owen T, C T Howe R, Ren Z, Bai J, Hasan T, Sun Z. Wavelength and pulse duration tunable ultrafast fiber laser mode-locked with carbon nanotubes. Sci Rep 2018; 8:2738. [PMID: 29426938 PMCID: PMC5807438 DOI: 10.1038/s41598-018-21108-3] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 01/16/2018] [Indexed: 11/08/2022] Open
Abstract
Ultrafast lasers with tunable parameters in wavelength and time domains are the choice of light source for various applications such as spectroscopy and communication. Here, we report a wavelength and pulse-duration tunable mode-locked Erbium doped fiber laser with single wall carbon nanotube-based saturable absorber. An intra-cavity tunable filter is employed to continuously tune the output wavelength for 34 nm (from 1525 nm to 1559 nm) and pulse duration from 545 fs to 6.1 ps, respectively. Our results provide a novel light source for various applications requiring variable wavelength or pulse duration.
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Affiliation(s)
- Diao Li
- State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, and Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, China
- Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150, Espoo, Finland
| | - Henri Jussila
- Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150, Espoo, Finland
| | - Yadong Wang
- Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150, Espoo, Finland
- MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions, and Shaanxi Key Laboratory of Optical Information Technology, School of Science, Northwestern Polytechnical University, 710072, Xi'an, China
| | - Guohua Hu
- Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA, Cambridge, UK
| | - Tom Albrow-Owen
- Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA, Cambridge, UK
| | - Richard C T Howe
- Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA, Cambridge, UK
| | - Zhaoyu Ren
- State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, and Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, China
| | - Jintao Bai
- State Key Lab Incubation Base of Photoelectric Technology and Functional Materials, and Institute of Photonics and Photon-Technology, Northwest University, 710069, Xi'an, China
| | - Tawfique Hasan
- Cambridge Graphene Centre, University of Cambridge, 9 JJ Thomson Avenue, CB3 0FA, Cambridge, UK.
| | - Zhipei Sun
- Department of Electronics and Nanoengineering, Aalto University, Tietotie 3, FI-02150, Espoo, Finland.
- QTF Centre of Excellence, Department of Applied Physics, Aalto University, FI-00076, Aalto, Finland.
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7
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Kim H, An H, Kim J, Lee S, Park K, Lee S, Hong S, Vazquez-Zuniga LA, Lee SY, Lee B, Jeong Y. Corrugation-assisted metal-coated angled fiber facet for wavelength-dependent off-axis directional beaming. OPTICS EXPRESS 2017; 25:8366-8385. [PMID: 28380950 DOI: 10.1364/oe.25.008366] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We propose a fiber-optic-plasmonic hybrid device that is based on a corrugation-assisted metal-coated angled fiber facet (CA-MCAFF) for wavelength-dependent off-axis directional beaming (WODB). The device breaks into two key structures: One is the MCAFF structure, which is a modified Kretschmann configuration implemented onto a fiber platform, thereby being able to generate a unidirectional surface plasmon with dramatically enhanced properties in terms of non-confined diffracted radiation loss and operational bandwidth. The other is the periodic corrugation structure put on the MCAFF, thereby enabling WODB functionality out of the whole structures. The corrugated metal surface out-couples the surface plasmon mode to free-space optical radiation into a direction that varies with the wavelength of the optical radiation with excellent linearity. We perform extensive numerical investigations based on the finite-element-method and analyze the out-coupling efficiency (OCEout) and spectral bandwidth (SBout) of the proposed device for various designs and conditions. We determine the seven structural parameters of the device via taking sequential optimization steps. We deduce two optimal conditions particularly for the fiber-facet angle, in terms of the averaged OCEout or the SBout in the whole visible wavelength range (400 - 700 nm), which eventually leads to OCEout = 30.4% and SBout = 230 nm or to OCEout = 24.5% and SBout = 245 nm, respectively. These results suggest substantial enhancements in both OCEout and SBout, in comparison with the performance properties of a typical nano-slit-based device having a similar type of WODB functionality. The proposed CA-MCAFF is a simple, compact and efficient WODB device that is fully compatible with the state-of-the-art optical fiber technology.
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Bowen P, Erkintalo M, Provo R, Harvey JD, Broderick NGR. Mode-locked Yb-doped fiber laser emitting broadband pulses at ultralow repetition rates. OPTICS LETTERS 2016; 41:5270-5273. [PMID: 27842110 DOI: 10.1364/ol.41.005270] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on an environmentally stable, Yb-doped, all-normal dispersion, mode-locked fiber laser that is capable of creating broadband pulses with ultralow repetition rates. Specifically, through careful positioning of fiber sections in an all-PM-fiber cavity mode-locked with a nonlinear amplifying loop mirror, we achieve stable pulse trains with repetition rates as low as 506 kHz. The pulses have several nanojules of energy and are compressible down to ultrashort (<500 fs) durations.
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Li D, Li L, Zhou J, Zhao L, Tang D, Shen D. Characterization and compression of dissipative-soliton-resonance pulses in fiber lasers. Sci Rep 2016; 6:23631. [PMID: 27025189 PMCID: PMC4812303 DOI: 10.1038/srep23631] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Accepted: 03/10/2016] [Indexed: 11/09/2022] Open
Abstract
We report numerical and experimental studies of dissipative-soliton-resonance (DSR) in a fiber laser with a nonlinear optical loop mirror. The DSR pulse presents temporally a flat-top profile and a clamped peak power. Its spectrum has a rectangle profile with characteristic steep edges. It shows a unique behavior as pulse energy increases: The rectangle part of the spectrum is unchanged while the newly emerging spectrum sits on the center part and forms a peak. Experimental observations match well with the numerical results. Moreover, the detailed evolution of the DSR pulse compression is both numerically and experimentally demonstrated for the first time. An experimentally obtained DSR pulse of 63 ps duration is compressed down to 760 fs, with low-intensity pedestals using a grating pair. Before being compressed to its narrowest width, the pulse firstly evolves into a cat-ear profile, and the corresponding autocorrelation trace shows a crown shape, which distinguishes itself from properties of other solitons formed in fiber lasers.
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Affiliation(s)
- Daojing Li
- Department of optical science and engineering, Fudan University, Shanghai 200433, China
| | - Lei Li
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, China
| | - Junyu Zhou
- School of Electrical and Electronic Engineering, University of Adelaide, SA 5005, Australia
| | - Luming Zhao
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, China
| | - Dingyuan Tang
- Jiangsu Key Laboratory of Advanced Laser Materials and Devices, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou, Jiangsu, 221116, China
| | - Deyuan Shen
- Department of optical science and engineering, Fudan University, Shanghai 200433, China
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10
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Sugavanam S, Fabbri S, Le ST, Lobach I, Kablukov S, Khorev S, Churkin D. Real-time high-resolution heterodyne-based measurements of spectral dynamics in fibre lasers. Sci Rep 2016; 6:23152. [PMID: 26984634 PMCID: PMC4794724 DOI: 10.1038/srep23152] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2015] [Accepted: 02/29/2016] [Indexed: 12/12/2022] Open
Abstract
Conventional tools for measurement of laser spectra (e.g. optical spectrum analysers) capture data averaged over a considerable time period. However, the generation spectrum of many laser types may involve spectral dynamics whose relatively fast time scale is determined by their cavity round trip period, calling for instrumentation featuring both high temporal and spectral resolution. Such real-time spectral characterisation becomes particularly challenging if the laser pulses are long, or they have continuous or quasi-continuous wave radiation components. Here we combine optical heterodyning with a technique of spatio-temporal intensity measurements that allows the characterisation of such complex sources. Fast, round-trip-resolved spectral dynamics of cavity-based systems in real-time are obtained, with temporal resolution of one cavity round trip and frequency resolution defined by its inverse (85 ns and 24 MHz respectively are demonstrated). We also show how under certain conditions for quasi-continuous wave sources, the spectral resolution could be further increased by a factor of 100 by direct extraction of phase information from the heterodyned dynamics or by using double time scales within the spectrogram approach.
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Affiliation(s)
- Srikanth Sugavanam
- Aston Institute of Photonic Technologies, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Simon Fabbri
- Aston Institute of Photonic Technologies, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Son Thai Le
- Aston Institute of Photonic Technologies, Aston University, Birmingham, B4 7ET, United Kingdom
| | - Ivan Lobach
- Institute of Automation and Electrometry SB RAS, 1 Ac. Koptyug Ave., Novosibirsk, 630090, Russia
| | - Sergey Kablukov
- Institute of Automation and Electrometry SB RAS, 1 Ac. Koptyug Ave., Novosibirsk, 630090, Russia
| | - Serge Khorev
- Zecotek Photonics, Inc., 1120-21331 Gordon Way, Richmond, BC V6W 1J9, Canada.,Novosibirsk State University, 630090, Novosibirsk, Russia
| | - Dmitry Churkin
- Aston Institute of Photonic Technologies, Aston University, Birmingham, B4 7ET, United Kingdom.,Institute of Automation and Electrometry SB RAS, 1 Ac. Koptyug Ave., Novosibirsk, 630090, Russia.,Novosibirsk State University, 630090, Novosibirsk, Russia
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11
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Harmonic Mode-Locked Fiber Laser based on Photonic Crystal Fiber Filled with Topological Insulator Solution. PHOTONICS 2015. [DOI: 10.3390/photonics2020342] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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12
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Bednyakova A, Turitsyn SK. Adiabatic soliton laser. PHYSICAL REVIEW LETTERS 2015; 114:113901. [PMID: 25839271 DOI: 10.1103/physrevlett.114.113901] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2014] [Indexed: 06/04/2023]
Abstract
The key to generating stable optical pulses is mastery of nonlinear light dynamics in laser resonators. Modern techniques to control the buildup of laser pulses are based on nonlinear science and include classical solitons, dissipative solitons, parabolic pulses (similaritons) and various modifications and blending of these methods. Fiber lasers offer remarkable opportunities to apply one-dimensional nonlinear science models for the design and optimization of very practical laser systems. Here, we propose a new concept of a laser based on the adiabatic amplification of a soliton pulse in the cavity-the adiabatic soliton laser. The adiabatic change of the soliton parameters during evolution in the resonator relaxes the restriction on the pulse energy inherent in traditional soliton lasers. Theoretical analysis is confirmed by extensive numerical modeling.
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Affiliation(s)
- Anastasia Bednyakova
- Novosibirsk State University, Novosibirsk 630090, Russia
- Institute of Computational Technologies, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Sergei K Turitsyn
- Novosibirsk State University, Novosibirsk 630090, Russia
- Aston Institute of Photonic Technologies, Aston University, Birmingham B4 7ET, United Kingdom
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13
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Woodward RI, Kelleher EJR, Runcorn TH, Loranger S, Popa D, Wittwer VJ, Ferrari AC, Popov SV, Kashyap R, Taylor JR. Fiber grating compression of giant-chirped nanosecond pulses from an ultra-long nanotube mode-locked fiber laser. OPTICS LETTERS 2015; 40:387-390. [PMID: 25680054 DOI: 10.1364/ol.40.000387] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrate that the giant chirp of coherent, nanosecond pulses generated in an 846 m long, all-normal dispersion, nanotube mode-locked fiber laser can be compensated using a chirped fiber Bragg grating compressor. Linear compression to 11 ps is reported, corresponding to an extreme compression factor of ∼100. Experimental results are supported by numerical modeling, which is also used to probe the limits of this technique. Our results unequivocally conclude that ultra-long cavity fiber lasers can support stable dissipative soliton attractors and highlight the design simplicity for pulse-energy scaling through cavity elongation.
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14
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Gao S, Wang Y, Sun R, Li H, Tian C, Jin D, Wang P. Ultraviolet-enhanced supercontinuum generation in uniform photonic crystal fiber pumped by a giant-chirped fiber laser. OPTICS EXPRESS 2014; 22:24697-24705. [PMID: 25322044 DOI: 10.1364/oe.22.024697] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report on an ultraviolet-enhanced supercontinuum generation in a uniform photonic crystal fiber pumped by a giant-chirped mode-locked Yb-doped fiber laser. We find theoretically and experimentally that the initial pluses with giant chirp leads more initial energy transferred to the dispersive waves in visible and ultraviolet wavelength. An extremely wide optical spectrum spanning from 370 nm to beyond 2400 nm with a broad 3 dB spectral bandwidth of 367 nm (from 431 nm to 798 nm) is obtained. Over 36% (350 mW) of the total output power locates in the visible and ultraviolet regime between 370 nm and 850 nm with a maximum spectral power density of 1.6 mW/nm at 550 nm.
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15
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Li X, Wang Y, Wang Y, Zhao W, Yu X, Sun Z, Cheng X, Yu X, Zhang Y, Wang QJ. Nonlinear absorption of SWNT film and its effects to the operation state of pulsed fiber laser. OPTICS EXPRESS 2014; 22:17227-17235. [PMID: 25090536 DOI: 10.1364/oe.22.017227] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We study a single-wall carbon nanotube (SWNT) Polyvinyl alcohol (PVA) composite as a saturable absorber (SA) for pulse generation in Yb-doped fiber lasers. The saturable absorption and optical limiting (OL) characteristics of the SWNT device are investigated. By combing these two nonlinear effects, we find out for the first time, to the best of our knowledge, that mode-locking can be obtained in the dissipative soliton regime at low pumping followed by Q-switching at high pumping, which is quite different from conventional pulse dynamic evolutions. The Q-switched state operating at higher pump powers is due to the OL effect. The inverted operating fiber laser can be applied in various potential applications such as versatile material processing, optical communication and radar system etc.
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16
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Hasan T, Sun Z, Tan P, Popa D, Flahaut E, Kelleher EJR, Bonaccorso F, Wang F, Jiang Z, Torrisi F, Privitera G, Nicolosi V, Ferrari AC. Double-wall carbon nanotubes for wide-band, ultrafast pulse generation. ACS NANO 2014; 8:4836-47. [PMID: 24735347 PMCID: PMC4240663 DOI: 10.1021/nn500767b] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 04/15/2014] [Indexed: 05/28/2023]
Abstract
We demonstrate wide-band ultrafast optical pulse generation at 1, 1.5, and 2 μm using a single-polymer composite saturable absorber based on double-wall carbon nanotubes (DWNTs). The freestanding optical quality polymer composite is prepared from nanotubes dispersed in water with poly(vinyl alcohol) as the host matrix. The composite is then integrated into ytterbium-, erbium-, and thulium-doped fiber laser cavities. Using this single DWNT-polymer composite, we achieve 4.85 ps, 532 fs, and 1.6 ps mode-locked pulses at 1066, 1559, and 1883 nm, respectively, highlighting the potential of DWNTs for wide-band ultrafast photonics.
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Affiliation(s)
- Tawfique Hasan
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Zhipei Sun
- Department of Micro- and Nanosciences, Aalto University, FI-00076 Aalto, Finland
| | - PingHeng Tan
- State Key Laboratory for Superlattices and Microstructures, Beijing 100083, China
| | - Daniel Popa
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Emmanuel Flahaut
- Université de Toulouse; UPS, INP; Institut Carnot Cirimat; 118, route de Narbonne, F-31062 Toulouse cedex 9, France
- CNRS; Institut Carnot Cirimat; F-31062 Toulouse, France
| | - Edmund J. R. Kelleher
- Femtosecond Optics Group, Department of Physics, Imperial College, London SW7 2AZ, United Kingdom
| | - Francesco Bonaccorso
- CNR-Istituto Processi Chimico-Fisici, 98158 Messina, Italy
- Istituto Italiano di Tecnologia, Graphene Labs, 16163, Genova, Italy
| | - Fengqiu Wang
- School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Zhe Jiang
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Felice Torrisi
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Giulia Privitera
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
| | - Valeria Nicolosi
- School of Chemistry, School of Physics, CRANN and AMBER, Trinity College Dublin D2, Ireland
| | - Andrea C. Ferrari
- Cambridge Graphene Centre, University of Cambridge, Cambridge CB3 0FA, United Kingdom
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Kelleher EJR, Travers JC. Chirped pulse formation dynamics in ultra-long mode-locked fiber lasers. OPTICS LETTERS 2014; 39:1398-1401. [PMID: 24690797 DOI: 10.1364/ol.39.001398] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
By modeling giant chirped pulse formation in ultra-long, normally dispersive, mode-locked fiber lasers, we verify convergence to a steady-state consisting of highly chirped and coherent, nanosecond-scale pulses, which is in good agreement with recent experimental results. Numerical investigation of the transient dynamics reveals the existence of dark soliton-like structures within the envelope of the initial noisy pulse structure. Quasi-stationary dark solitons can persist throughout a large part of the evolution from noise to a stable dissipative soliton solution of the mode-locked laser cavity.
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18
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Aguergaray C, Runge A, Erkintalo M, Broderick NGR. Raman-driven destabilization of mode-locked long cavity fiber lasers: fundamental limitations to energy scalability. OPTICS LETTERS 2013; 38:2644-2646. [PMID: 23903099 DOI: 10.1364/ol.38.002644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the destabilization of the mode-locking operation of a long cavity fiber laser. We show that the destabilization is accompanied by the abrupt emergence of a strong frequency-downshifted Stokes signal, and simultaneously, we find that the laser output displays characteristics typical of noise-like pulses. We use numerical simulations to illustrate how the Stokes signal grows from stimulated Raman scattering and plays a key role in the destabilization of the laser output. Our results indicate that stimulated Raman scattering may impose an ultimate limit on the energy scalability via cavity lengthening.
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Yarutkina IA, Shtyrina OV, Fedoruk MP, Turitsyn SK. Numerical modeling of fiber lasers with long and ultra-long ring cavity. OPTICS EXPRESS 2013; 21:12942-12950. [PMID: 23736514 DOI: 10.1364/oe.21.012942] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We highlight two important aspects related to a mathematical modeling of pulsed fiber lasers with long and ultra-long ring cavity -impact of an initial noise and a cavity length on generation of single optical pulses. Using as an example a simple scalar model of a ring fiber laser that describes the radiation build-up from noise and the following intra-cavity pulse dynamics during a round trip we study dependence of generated pulse characteristics on the resonator length in the range from 30 m up to 2 km.
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Affiliation(s)
- I A Yarutkina
- Institute of Computational Technologies, Siberian Branch of the Russian Academy of Sciences, 6 Ac Lavrentjev Avenue, Novosibirsk 630090, Russia.
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20
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Winful HG. Chirped Brillouin dynamic gratings for storing and compressing light. OPTICS EXPRESS 2013; 21:10039-10047. [PMID: 23609709 DOI: 10.1364/oe.21.010039] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We demonstrate theoretically that chirped dynamic gratings can be created in optical fibers through stimulated Brillouin scattering with frequency-chirped "signal" and "write" pulses. When the grating is interrogated with a third pulse of the opposite chirp, a compressed signal pulse is retrieved. This provides a method to regenerate stored pulses and enhance signal levels for communications applications.
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Affiliation(s)
- Herbert G Winful
- Centre for Ultrahigh bandwidth Devices for Optical Systems (CUDOS), School of Physics, University of Sydney, Sydney, NSW 2007, Australia.
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21
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Erkintalo M, Aguergaray C, Runge A, Broderick NGR. Environmentally stable all-PM all-fiber giant chirp oscillator. OPTICS EXPRESS 2012; 20:22669-22674. [PMID: 23037416 DOI: 10.1364/oe.20.022669] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We report on an environmentally stable giant chirp oscillator operating at 1030 nm. Thanks to the use of a nonlinear amplifying loop mirror as the mode-locker, we are able to extract pulse energies in excess of 10 nJ from a robust all-PM cavity with no free-space elements. Extensive numerical simulations reveal that the output oscillator energy and duration can simply be up-scaled through the lengthening of the cavity with suitably positioned single-mode fiber. Experimentally, using different cavity lengths we have achieved environmentally stable mode-locking at 10, 3.7 and 1.7 MHz with corresponding pulse energies of 2.3, 10 and 16 nJ. In all cases external grating-pair compression below 400 fs has been demonstrated.
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Affiliation(s)
- Miro Erkintalo
- Physics Department, University of Auckland, Private Bag 92019, Auckland, New Zealand.
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22
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Fedotov YS, Kobtsev SM, Arif RN, Rozhin AG, Mou C, Turitsyn SK. Spectrum-, pulsewidth-, and wavelength-switchable all-fiber mode-locked Yb laser with fiber based birefringent filter. OPTICS EXPRESS 2012; 20:17797-17805. [PMID: 23038330 DOI: 10.1364/oe.20.017797] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We examined methods of controlling the pulse duration, spectral width and wavelength of the output from an all-fiber Yb laser mode-locked by carbon nanotubes. It is shown that a segment of polarization maintaining (PM) fiber inserted into a standard single mode fiber based laser cavity can function as a spectral selective filter. Adjustment of the length of the PM fiber from 1 to 2 m led to a corresponding variation in the pulse duration from 2 to 3.8 ps, the spectral bandwidth of the laser output changes from 0.15 to 1.26 nm. Laser output wavelength detuning within up to 5 nm was demonstrated with a fixed length of the PM fiber by adjustment of the polarization controller.
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Affiliation(s)
- Y S Fedotov
- Division of Laser Physics and Innovative Technologies, Novosibirsk State University, Novosibirk, 630090, Russia.
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23
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Ozgören K, Oktem B, Yilmaz S, Ilday FÖ, Eken K. 83 W, 3.1 MHz, square-shaped, 1 ns-pulsed all-fiber-integrated laser for micromachining. OPTICS EXPRESS 2011; 19:17647-52. [PMID: 21935132 DOI: 10.1364/oe.19.017647] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We demonstrate an all-fiber-integrated laser based on off-the-shelf components producing square-shaped, 1 ns-long pulses at 1.03 μm wavelength with 3.1 MHz repetition rate and 83 W of average power. The master-oscillator power-amplifier system is seeded by a fiber oscillator utilizing a nonlinear optical loop mirror and producing incompressible pulses. A simple technique is employed to demonstrate that the pulses indeed have a random chirp. We propose that the long pulse duration should result in more efficient material removal relative to picosecond pulses, while being short enough to minimize heat effects, relative to nanosecond pulses commonly used in micromachining. Micromachining of Ti surfaces using 0.1 ns, 1 ns and 100 ns pulses supports these expectations.
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Affiliation(s)
- Kivanç Ozgören
- Institute of Materials Science and Nanotechnology, Bilkent University, Ankara, Turkey.
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24
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Liu D, Zhu X, Wang C, Yu J, Hu D. Low-repetition-rate, high-energy, twin-pulse, passively mode locked Yb3+-doped fiber laser. APPLIED OPTICS 2011; 50:484-491. [PMID: 21283239 DOI: 10.1364/ao.50.000484] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We report an all-normal-dispersion, low-repetition-rate, high-energy, twin-pulse, passively mode locked ytterbium-doped fiber laser. The mode-locking mechanism of the laser is based on nonlinear polarization evolution and strong pulse shaping with a cascade long-period fiber grating bandpass filtering in a highly chirped pulse. The laser generates a highly stable twin-pulse group with 248 ps and 296 ps duration simultaneously and maximum pulse energy of 26.8 nJ-each pulse at a 2.5445 MHz repetition rate. Energy quantization is observed, which demonstrates the nonparabolic nature of these pulses. The laser can also work in third-harmonic mode locking with 17.8 nJ energy (at a repetition rate of 7.65 MHz and pulse width of 780 ps).
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Affiliation(s)
- Dongfeng Liu
- Institute of Modern Optical Technologies, Soochow University, Suzhou, Jiangsu, China.
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25
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Zhao LM, Tang DY, Zhang H, Wu X, Bao Q, Loh KP. Dissipative soliton operation of an ytterbium-doped fiber laser mode locked with atomic multilayer graphene. OPTICS LETTERS 2010; 35:3622-3624. [PMID: 21042370 DOI: 10.1364/ol.35.003622] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Mode locking of an ytterbium-doped fiber laser with atomic multilayer graphene is, to the best of our knowledge, experimentally demonstrated for the first time. Dissipative solitons with duration of 580 ps at 1069.8 nm were generated. Since graphene can also be used to mode lock erbium-doped fiber lasers, our result shows that graphene indeed has wavelength-independent saturable absorption, which could be exploited to mode lock fiber lasers with various operating wavelengths.
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Affiliation(s)
- L M Zhao
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore
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