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Su X, Wang Y, Yin Y, Wang M, Zhang B, He J, Zhang B. Sub-100-fs Kerr-lens mode-locked Yb:Lu 2O 3 laser with more than 60% optical efficiency. OPTICS LETTERS 2024; 49:145-148. [PMID: 38134173 DOI: 10.1364/ol.513788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 12/07/2023] [Indexed: 12/24/2023]
Abstract
Yb-doped sesquioxides represent one of the most excellent laser crystals applying for high-power ultrafast lasers owing to their very high thermal conductivities and broadband emission spectra. Pumped by a high-brightness Yb-fiber laser at 976 nm, the Yb:Lu2O3 laser delivers a maximum output power that amounts to 3.55 W in the continuous-wave regime with an optical efficiency of 75%. In the mode-locked regime, 90-fs pulses were generated via soft-aperture Kerr-lens mode-locking at 1080.6 nm with an average output power of 2.85 W, which corresponds to an optical efficiency of 60.3% and a slope efficiency of 68.8%. Average output power of the mode-locked Yb:Lu2O3 laser can be further scaled to 3.05 W at the expense of the pulse duration (178 fs), which corresponds to an optical efficiency as high as 64.5%. To the best of our knowledge, it is the highest optical efficiency ever reported from any solid-state Kerr-lens mode-locked Yb lasers.
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2
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Lin ZL, Xue WZ, Zeng HJ, Zhang G, Zhao Y, Xu X, Xu J, Loiko P, Mateos X, Lin H, Petrov V, Wang L, Chen W. Semiconductor saturable absorber mirror mode-locked Yb:YAP laser. OPTICS EXPRESS 2022; 30:31986-31997. [PMID: 36242269 DOI: 10.1364/oe.464815] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 08/09/2022] [Indexed: 06/16/2023]
Abstract
We report on sub-30 fs pulse generation from a semiconductor saturable absorber mirror mode-locked Yb:YAP laser. Pumping by a spatially single-mode Yb fiber laser at 979 nm, soliton pulses as short as 29 fs were generated at 1091 nm with an average output power of 156 mW and a pulse repetition rate of 85.1 MHz. The maximum output power of the mode-locked Yb:YAP laser amounted to 320 mW for slightly longer pulses (32 fs) at an incident pump power of 1.52 W, corresponding to a peak power of 103 kW and an optical efficiency of 20.5%. To the best of our knowledge, this result represents the shortest pulses ever achieved from any solid-state Yb laser mode-locked by a slow, i.e., physical saturable absorber.
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3
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Drs J, Fischer J, Modsching N, Labaye F, Wittwer VJ, Südmeyer T. Sub-30-fs Yb:YAG thin-disk laser oscillator operating in the strongly self-phase modulation broadened regime. OPTICS EXPRESS 2021; 29:35929-35937. [PMID: 34809016 DOI: 10.1364/oe.440196] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 10/06/2021] [Indexed: 06/13/2023]
Abstract
We experimentally investigate the limits of pulse duration in a Kerr-lens mode-locked Yb:YAG thin-disk laser (TDL) oscillator. Thanks to its excellent mechanical and optical properties, Yb:YAG is one of the most used gain materials for continuous-wave and pulsed TDLs. In mode-locked operation, its 8-nm wide gain bandwidth only directly supports pulses with a minimum duration of approximately 140 fs. For achieving shorter pulses, a Kerr-lens mode-locked TDL oscillator can be operated in the strongly self-phase modulation (SPM) broadened regime. Here, the spectral bandwidth of the oscillating pulse exceeds the available gain bandwidth by generating additional frequencies via SPM inside the Kerr medium. In this work, we study and compare different laser configurations in the strongly SPM-broadened regime. Starting with a configuration providing 84-fs pulses at 69 W average power at 17 MHz repetition rate, we reduce the pulse duration by optimizing various mode-locking parameters. One crucial parameter is the dispersion control which was provided by in-house-developed dispersive mirrors produced by ion-beam sputtering (IBS). We discuss trade-offs in average power, pulse duration, efficiency, and intra-cavity peak power. For the configuration operating at the highest SPM-broadening, we achieve a minimum pulse duration of 27 fs, which represents the shortest pulse duration directly generated by any ultrafast TDL oscillator. The corresponding full width at half maximum (FWHM) spectral bandwidth exceeds more than five times the FWHM gain bandwidth. The average output power of 3.3 W is moderate for ultrafast TDL oscillators, but higher than other Yb-based laser oscillators operating at this pulse duration. Additionally, the corresponding intra-cavity peak power of 0.8 GW is highly attractive for implementing intra-cavity extreme nonlinear optical interactions such as high harmonic generation.
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Liu Z, Ikesue A, Li J. Research progress and prospects of rare-earth doped sesquioxide laser ceramics. Ann Ital Chir 2021. [DOI: 10.1016/j.jeurceramsoc.2021.02.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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5
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Nagl N, Gröbmeyer S, Pervak V, Krausz F, Pronin O, Mak KF. Directly diode-pumped, Kerr-lens mode-locked, few-cycle Cr:ZnSe oscillator. OPTICS EXPRESS 2019; 27:24445-24454. [PMID: 31510333 DOI: 10.1364/oe.27.024445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Lasers based on Cr2+-doped II-VI material, often known as the Ti:Sapphire of the mid-infrared, can directly provide few-cycle pulses with octave-spanning spectra, and serve as efficient drivers for generating broadband mid-infrared radiation. It is expected that the wider adoption of this technology benefits from more compact and cost-effective embodiments. Here, we report the first directly diode-pumped, Kerr-lens mode-locked Cr2+-doped II-VI oscillator pumped by a single InP diode, providing average powers over 500 mW and pulse durations of 45 fs - shorter than six optical cycles at 2.4 µm. These correspond to a sixty-fold increase in peak power compared to the previous diode-pumped record, and are at similar levels with respect to more mature fiber-pumped oscillators. The diode-pumped femtosecond oscillator presented here constitutes a key step toward a more accessible alternative to synchrotron-like infrared radiation and is expected to accelerate research in laser spectroscopy and ultrafast infrared optics.
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Zhang Y, Miao R, Lu D, Tonelli M, Wang J, Yu H, Zhang H. Kerr-lens mode-locked Pr 3+:LuLiF 4 laser. OPTICS LETTERS 2019; 44:3665-3668. [PMID: 31368938 DOI: 10.1364/ol.44.003665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 06/20/2019] [Indexed: 06/10/2023]
Abstract
We demonstrate the Kerr-lens mode-locked Pr3+:LuLiF4 (Pr:LLF) laser pumped by a blue laser diode (LD). By theoretical calculation of the group velocity dispersion in the laser gain, the compensation was employed for the realization of the continuous-wave mode-locked laser at the wavelength of 604 nm with the pulse width of 1.1 ps which, to the best of our knowledge, is the shortest pulse width in the Pr3+ ion doped crystal lasers pumped with LDs. It can be believed that the present Pr:LLF laser should provide some inspiration for the development of the blue LD pumped visible lasers, especially in the mode-locking laser operation.
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7
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Modsching N, Drs J, Fischer J, Paradis C, Labaye F, Gaponenko M, Kränkel C, Wittwer VJ, Südmeyer T. Sub-100-fs Kerr lens mode-locked Yb:Lu 2O 3 thin-disk laser oscillator operating at 21 W average power. OPTICS EXPRESS 2019; 27:16111-16120. [PMID: 31163797 DOI: 10.1364/oe.27.016111] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 05/06/2019] [Indexed: 06/09/2023]
Abstract
We investigate power-scaling of a Kerr lens mode-locked (KLM) Yb:Lu2O3 thin-disk laser (TDL) oscillator operating in the sub-100-fs pulse duration regime. Employing a scheme with higher round-trip gain by increasing the number of passes through the thin-disk gain element, we increase the average power by a factor of two and the optical-to-optical efficiency by a factor of almost three compared to our previous sub-100-fs mode-locking results. The oscillator generates pulses with a duration of 95 fs at 21.1 W average power and 47.9 MHz repetition rate. We discuss the cavity design for continuous-wave and mode-locked operation and the estimation of the focal length of the Kerr lens. Unlike to usual KLM TDL oscillators, an operation at the edge of the stability zone in continuous-wave operation is not required. This work shows that KLM TDL oscillators based on the gain material Yb:Lu2O3 are an excellent choice for power-scaling of laser oscillators in the sub-100-fs regime, and we expect that such lasers will soon operate at power levels in excess of hundred watts.
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Kitajima S, Shirakawa A, Yagi H, Yanagitani T. Sub-100 fs pulse generation from a Kerr-lens mode-locked Yb:Lu 2O 3 ceramic thin-disk laser. OPTICS LETTERS 2018; 43:5451-5454. [PMID: 30383029 DOI: 10.1364/ol.43.005451] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 10/11/2018] [Indexed: 06/08/2023]
Abstract
In this Letter, we demonstrate, to the best of our knowledge, the first Kerr-lens mode-locked (KLM) ceramic thin-disk laser. Ceramic laser gain media have many advantages for a high-power laser such as high fracture toughness, size scalability, low cost, and short time fabrication. By using the Yb:Lu2O3 ceramic thin disk, the pulse duration of 98 fs with the output power of 3.7 W was demonstrated. The shortest pulse duration was 86 fs with the decreased output power of 0.36 W. From our results, it was proven that a KLM thin-disk laser with ceramic gain media can become a new option for high-power, sub-100 fs pulse laser sources.
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9
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Liu H, Fan YX, Li L, Chen HG, Wang PF, Tao ZY. Self-adaptive terahertz spectroscopy from atmospheric vapor based on Hilbert-Huang transform. OPTICS EXPRESS 2018; 26:27279-27293. [PMID: 30469799 DOI: 10.1364/oe.26.027279] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 09/19/2018] [Indexed: 06/09/2023]
Abstract
Absorption lines of atmospheric vapor commonly appear in terahertz (THz) spectra measured in a humid air environment. However, these effects are generally undesirable because they may mask critical spectroscopic information. Here, a self-adaptive method is demonstrated for effectively identifying and eliminating atmospheric vapor noise from THz spectra of an all-fiber THz system with the Hilbert-Huang transform. The THz signal was decomposed into eight components in different time scales called the intrinsic mode functions and the interference of atmospheric vapor was accurately isolated. A series of experiments confirmed the effectiveness and strong self-adaptiveness of the proposed system in vapor noise elimination.
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10
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Ma J, Pan Z, Wang J, Yuan H, Cai H, Xie G, Qian L, Shen D, Tang D. Generation of sub-50fs soliton pulses from a mode-locked Yb,Na:CNGG disordered crystal laser. OPTICS EXPRESS 2017; 25:14968-14973. [PMID: 28788932 DOI: 10.1364/oe.25.014968] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 06/13/2017] [Indexed: 06/07/2023]
Abstract
We experimentally demonstrated a diode-pumped sub-50 fs Yb,Na:CNGG disordered crystal laser. Pumped by a 980 nm distributed Bragg-reflector tapered diode laser and passively mode-locked with a semiconductor saturable absorber mirror (SESAM), soliton pulses as short as 62 fs and 45 fs were obtained without and with external compression, respectively. The ultrashort pulses had a repetition rate of ~104 MHz at the central wavelength of 1061 nm. To the best of our knowledge, this is the first demonstration of sub-50 fs pulses from the Yb3+-doped CNGG type disordered crystal lasers.
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11
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Caracciolo E, Pirzio F, Kemnitzer M, Gorjan M, Guandalini A, Kienle F, Agnesi A, Aus Der Au J. 42 W femtosecond Yb:Lu 2O 3 regenerative amplifier. OPTICS LETTERS 2016; 41:3395-3398. [PMID: 27472577 DOI: 10.1364/ol.41.003395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We report on a femtosecond high-power regenerative amplifier based on Yb:Lu2O3. Exploiting the excellent thermo-mechanical properties of this material, we were able to achieve up to 64.5 W in continuous-wave regime, limited only by the available pump power. In pulsed operation, 42 W of average output power at a repetition rate of 500 kHz with 780 fs long pulses could be demonstrated, resulting in a pulse peak power of ∼100 MW. The spectrum was centered at 1034 nm with an FWHM of 2.4 nm, potentially allowing for even shorter pulses. At the maximum output power the beam was nearly TEM00, with an M2 value of 1.2 in both axes.
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12
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Efficient OPSL-pumped mode-locked Yb:Lu2O3 laser with 67% optical-to-optical efficiency. Sci Rep 2016; 6:19090. [PMID: 26739546 PMCID: PMC4703958 DOI: 10.1038/srep19090] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2015] [Accepted: 12/07/2015] [Indexed: 12/04/2022] Open
Abstract
We present a mode-locked Yb:Lu2O3 laser with up to 67% of optical-to-optical efficiency. By utilizing a high brightness optically pumped semiconductor laser (OPSL) as a pump source and using a semiconductor saturable absorber mirror (SESAM) we obtained self-starting mode locking. A pulse duration of 571 fs at 4.73 W of average output power with an optical-to-optical efficiency of 67% was achieved. In a slightly different cavity configuration the pulse duration was reduced to 313 fs at 2.16 W of average output power. In both cases the pulse duration was longer than the Fourier limit and the spectrum supports significantly shorter pulse durations. The laser wavelength is centered at 1034 nm and the repetition rate is 100.76 MHz in both cases. In continuous wave fundamental mode operation the optical-to-optical efficiency was as high as 78% with output powers exceeding 5 W.
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13
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Gao Z, Zhu J, Tian W, Wang J, Zhang Z, Wei Z, Yu H, Zhang H, Wang J. Generation of 73 fs pulses from a diode pumped Kerr-lens mode-locked Yb:YCa₄O(BO₃)₃ laser. OPTICS LETTERS 2014; 39:5870-5872. [PMID: 25361106 DOI: 10.1364/ol.39.005870] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We realized a stable Kerr-lens mode-locked operation in a Yb:YCa₄O(BO₃)₃ laser. Pulses as short as 73 fs were generated at the central wavelength of 1043 nm, with a bandwidth of 19 nm. The femtosecond oscillator operating at a repetition rate of 110 MHz delivers an average output power of 70 mW under 3 W diode pump power. To the best of our knowledge, this is the first demonstration of a pure Kerr-lens mode-locked operation in a diode-pumped Yb:YCa₄O(BO₃)₃ laser.
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14
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Larin S, Antipov O, Sypin V, Vershinin O. Hybrid booster at 1940 nm based on Tm:Lu₂O₃ ceramics implementing fiber combined signal and pump sources. OPTICS LETTERS 2014; 39:3216-3218. [PMID: 24876016 DOI: 10.1364/ol.39.003216] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A novel concept of a booster amplifier for a pulsed Tm fiber laser at 1940 nm based on Tm:Lu2O3 ceramics and implementing fiber-combined signal and pump was examined. The pumping emission of the ceramics at 1678 nm was obtained from Raman-shifted Er fiber laser radiation. The hybrid fiber-ceramics amplifier with a gain factor of up to 6 dB and a pulse energy of more than 650 μJ with single-mode output was demonstrated.
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15
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Zhao H, Major A. Powerful 67 fs Kerr-lens mode-locked prismless Yb:KGW oscillator. OPTICS EXPRESS 2013; 21:31846-31851. [PMID: 24514780 DOI: 10.1364/oe.21.031846] [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
We report on the generation of 67 fs pulses from a diode pumped Kerr-lens mode-locked Yb:KGW bulk laser. The average output power reached 3 W, corresponding to >38 nJ of pulse energy and >570 kW of peak power. The mode locking was initiated by a semiconductor saturable absorber. To the best of our knowledge, this is the highest average output power produced to date from Yb-ion based bulk lasers with such a short pulse duration.
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16
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Zhang J, Han H, Tian W, Lv L, Wang Q, Wei Z. Diode-pumped 88-fs Kerr-lens mode-locked Yb:Y₃Ga₅O₁₂ crystal laser. OPTICS EXPRESS 2013; 21:29867-29873. [PMID: 24514537 DOI: 10.1364/oe.21.029867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We realized a stable Kerr-lens mode-locked operation in a diode-pumped Yb:Y₃Ga₅O₁₂ laser. Pulses as short as 88 fs at the center wavelength of 1042 nm were obtained at a repetition rate of 159.3 MHz. The maximum output power was 104 mW under the incident pump power of 3.9 W. By comparing the mode-locked characteristics under different output transmissions, we obtained pulses with the highest output power of 330 mW and a duration of 149 fs. To the best of our knowledge, this is the first demonstration of a Kerr-lens mode-locked Yb:Y₃Ga₅O₁₂ laser.
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17
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Pronin O, Brons J, Grasse C, Pervak V, Boehm G, Amann MC, Kalashnikov VL, Apolonski A, Krausz F. High-power 200 fs Kerr-lens mode-locked Yb:YAG thin-disk oscillator. OPTICS LETTERS 2011; 36:4746-4748. [PMID: 22179870 DOI: 10.1364/ol.36.004746] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We demonstrate a power-scalable Kerr-lens mode-locked Yb:YAG thin-disk oscillator. It delivers 200 fs pulses at an average power of 17 W and a repetition rate of 40 MHz. At an increased (180 W) pump power level, the laser produces 270 fs 1.1 μJ pulses at an average power of 45 W (optical-to-optical efficiency of 25%). Semiconductor-saturable-absorber-mirror-assisted Kerr-lens mode locking (KLM) and pure KLM with a hard aperture show similar performance. To our knowledge, these are the shortest pulses achieved from a mode-locked Yb:YAG disk oscillator and this is the first demonstration of a Kerr-lens mode-locked thin-disk laser.
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Affiliation(s)
- O Pronin
- Max-Planck Institut für Quantenoptik, Garching, Germany.
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18
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Tokurakawa M, Shirakawa A, Ueda K, Peters R, Fredrich-Thornton ST, Petermann K, Huber G. Ultrashort pulse generation from diode pumped mode-locked Yb3+:sesquioxide single crystal lasers. OPTICS EXPRESS 2011; 19:2904-2909. [PMID: 21369112 DOI: 10.1364/oe.19.002904] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present diode pumped SESAM supported Kerr-lens mode locked laser operation based on Yb3+:Sc2O3 and Yb3+:Lu2O3 single crystals. Pulses as short as 71 fs with an average power of 1.09 W were obtained from an Yb3+:Lu2O3 single crystal. Yb3+:Sc2O3 delivered pulses as short as 81 fs with an average power of 840 mW. The mode locked laser operation was stable for longer than 2 hours.
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Affiliation(s)
- M Tokurakawa
- Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
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20
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Tan WD, Tang DY, Xu XD, Li DZ, Zhang J, Xu CW, Xu J. Femtosecond and continuous-wave laser performance of a diode-pumped Yb3+:CaYAlO4 laser. OPTICS LETTERS 2011; 36:259-261. [PMID: 21263519 DOI: 10.1364/ol.36.000259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The cw and femtosecond laser operations of Yb(3+):CaYAlO(4) (Yb:CYA) are demonstrated. The laser emitted a maximum cw power of 1.94 W with a slope efficiency (η(slope)) of 71% and an optical-to-optical efficiency (η(opt)) of 51%. Under mode-locking operation, the laser emitted near transform-limited pulses with 156 fs pulse width, 8.1 nJ pulse energy and 0.74 W average power. The η(slope) and η(opt) of the mode-locked laser were 37% and 20%, respectively.
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Affiliation(s)
- W D Tan
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798
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21
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Pirri A, Toci G, Alderighi D, Vannini M. Effects of the excitation density on the laser output of two differently doped Yb:YAG ceramics. OPTICS EXPRESS 2010; 18:17262-17272. [PMID: 20721114 DOI: 10.1364/oe.18.017262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We report the behavior of two Yb(3+) doped ceramics (i.e. 10% at. and 20% at.) under quasi-continuous wave laser pumping. Two different behaviors are found depending on the density of Yb(3+) in the excited level. Experimental results show that at low population inversion density, the maximum output power and the efficiency are almost independent on the doping concentration. In particular, an output power as high as 8.9 W with a corresponding slope efficiency of 52% with respect to the injected pump power was reached with the 20% at. sample. Conversely, at high population inversion densities, the 20% doped sample shows a sudden decrease of the laser output for increasing pump power, due to the onset of a nonlinear loss mechanism. Finally, we report a comparison of the experimental results with numerical simulations for the evaluation of the inversion density and of the temperature distribution.
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Affiliation(s)
- Angela Pirri
- Istituto di Fisica Applicata Nello Carrara, Consiglio Nazionale delle Ricerche IFAC-CNR, Via Madonna del Piano 10C, 50019 Sesto Fiorentino, FI, Italy
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22
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Tokurakawa M, Kurokawa H, Shirakawa A, Ueda K, Yagi H, Yanagitani T, Kaminskii AA. Continuous-wave and mode-locked lasers on the base of partially disordered crystalline Yb3+:{YGd2}[Sc2](Al2Ga)O12 ceramics. OPTICS EXPRESS 2010; 18:4390-4395. [PMID: 20389451 DOI: 10.1364/oe.18.004390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We present cw and mode-locked laser operations on the base of partially disordered crystalline Yb(3+):{YGd(2)}[Sc(2)](Al(2)Ga)O(12) ceramics. In continuous-wave laser operations, the average power of 2.9 W at the wavelength of 1051 nm and 2.8 W at the wavelength of 1031 nm with above 40% optical-to-optical efficiencies were achieved. In mode-locked laser operation, pulses as short as 69 fs with the average power of 820 mW was also obtained.
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Affiliation(s)
- M Tokurakawa
- Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Chofu, Tokyo 182-8585, Japan.
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Pirri A, Alderighi D, Toci G, Vannini M. High-efficiency, high-power and low threshold Yb3+:YAG ceramic laser. OPTICS EXPRESS 2009; 17:23344-23349. [PMID: 20052262 DOI: 10.1364/oe.17.023344] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We present a high-power, high-efficiency and low threshold laser prototype based on doped ceramic Yb(3+):YAG. We achieved an output power of 9 W with a slope efficiency of 73% and a threshold of 1 W at 1030 nm in quasi-Continuous Wave (QCW). Moreover, we obtained an output power 7.7 W with a slope efficiency of 60% in Continuous Wave (CW). Finally, a characterization of a low losses tunable cavity for several laser wavelengths with an output power exceeding 5 W is reported.
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Affiliation(s)
- Angela Pirri
- Istituto di Fisica Applicata Carrara, IFAC-CNR Via Madonna del Piano 10C, 50019 Sesto Fiorentino (FI), taly
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24
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Baer CRE, Kränkel C, Heckl OH, Golling M, Südmeyer T, Peters R, Petermann K, Huber G, Keller U. 227-fs pulses from a mode-locked Yb:LuScO3 thin disk laser. OPTICS EXPRESS 2009; 17:10725-10730. [PMID: 19550469 DOI: 10.1364/oe.17.010725] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report on the first mode-locked thin disk laser based on Yb:LuScO(3). This new mixed gain material combines the emission peaks of two sesquioxides, leading to a gain bandwidth of more than 20 nm. We achieve 7.2 W average output power in 227-fs pulses, which is shorter than for any previous ultrafast thin disk laser. The output power was limited by a growth defect near the center of the thin disk.
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Affiliation(s)
- Cyrill R E Baer
- Department of Physics, Institute of Quantum Electronics, ETH Zurich, Zurich, Switzerland.
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25
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Yoshioka H, Nakamura S, Ogawa T, Wada S. Diode-pumped mode-locked Yb:YAG ceramic laser. OPTICS EXPRESS 2009; 17:8919-8925. [PMID: 19466141 DOI: 10.1364/oe.17.008919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A diode-pumped passively mode-locked Yb:YAG ceramic laser was demonstrated. 417 and 286 fs pulses with average powers of 250 and 25 mW were obtained at 1030 nm using 1 and 0.1% output couplers, respectively. 233 fs pulses with an average power of 20 mW were also obtained at a center wavelength of 1048.3 nm using a 0.1% output coupler. To the best of our knowledge, this is the first demonstration of a diode-pumped mode-locked Yb:YAG ceramic laser.
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Affiliation(s)
- Hiroaki Yoshioka
- Department of Media and Telecommunications, Faculty of Engineering, Ibaraki University, 4-12-1 Nakanarusawa, Hitachi, Ibaraki 316-8511, Japan
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Tokurakawa M, Shirakawa A, Ueda KI, Yagi H, Noriyuki M, Yanagitani T, Kaminskii AA. Diode-pumped ultrashort-pulse generation based on Yb(3+):Sc(2)O(3) and Yb(3+):Y(2)O(3) ceramic multi-gain-media oscillator. OPTICS EXPRESS 2009; 17:3353-3361. [PMID: 19259172 DOI: 10.1364/oe.17.003353] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Diode-pumped mode-locked laser operation based on Yb(3+):Sc(2)O(3) and Yb(3+):Y(2)O(3) multi-gain-media oscillator has been demonstrated. 66-fs pulse duration with an average power of 1.5 W and 53-fs pulse duration with an average power of 1 W under 8-W laser diode pumping were achieved. The optical-to-optical efficiency was 18.8%. Additionally, 68-fs pulse duration with an average power of 540 mW from Yb(3+):Y(2)O(3) ceramic was also obtained.
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Affiliation(s)
- Masaki Tokurakawa
- Institute for Laser Science, University of Electro-Communications, 1-5-1 Chofugaoka, Choufu, Tokyo 182-8585, Japan.
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