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Zuo Y, Wu B, Shen Y. High beam quality continuous-wave 320 nm UV laser from a walk-off compensated intracavity frequency-doubled Pr:YLF laser. APPLIED OPTICS 2024; 63:4332-4335. [PMID: 38856610 DOI: 10.1364/ao.522760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Accepted: 04/29/2024] [Indexed: 06/11/2024]
Abstract
We report a high beam quality continuous-wave (CW) 320 nm ultra-violet (UV) laser. An end-pumped praseodymium-doped yttrium lithium fluoride (Pr:YLF) laser is constructed in a typical V-shaped cavity structure, while the UV output is obtained through intracavity frequency doubling using L i B 3 O 5 (LBO). We investigate the dependence of the UV output power, as well as the spot profile on the LBO length, and find that the "walk-off" within LBO severely affects both the frequency-doubling efficiency and the beam quality of the UV output. Rotated twin LBO crystals are then applied to substitute for single long LBO crystal to compensate the walk-off effect, resulting in high-power 320 nm output up to 410 mW under the absorbed pump power of 4.0 W at 444 nm, with a high beam quality of M x2=1.02 and M y2=1.04.
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2
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Chen X, Chen Y, Zhang L, Fan F, Zhang Z, Zhang G, Wang X, Wang L. 5.32 W ultraviolet laser generation at 266 nm using sum-frequency method with CsB 3O 5 crystal. OPTICS EXPRESS 2023; 31:802-809. [PMID: 36785129 DOI: 10.1364/oe.474095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 11/23/2022] [Indexed: 06/18/2023]
Abstract
Ultraviolet (UV) beam generation at 266 nm using the sum-frequency (SFG) method with CsB3O5 (CBO) crystals was first suggested in 1997 [Opt. Lett.22, 1840 (1997).10.1364/OL.22.001840]; however, there has been no further research in the past 25 years. Herein, by sum-frequency mixing in CBO crystals, we obtained a high conversion efficiency picosecond (ps) and a high-power nanosecond (ns) 266 nm UV beam output. First, a ps laser device with simultaneously radiated wavelengths of 1064 and 355 nm and repetition frequency of 10 Hz was used as the fundamental laser source, and the conversion efficiency from 1064 + 355 nm to 266 nm reached 20.35%. We then used a 1064 nm ns laser with a high output power and repetition frequency of 10 kHz as the pump source. We accurately modified the optimal phase matching direction of the CBO crystal, and the achieved output power at 266 nm reached 5.32 W.
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Kraus B, Dawel F, Hannig S, Kramer J, Nauk C, Schmidt PO. Phase-stabilized UV light at 267 nm through twofold second harmonic generation. OPTICS EXPRESS 2022; 30:44992-45007. [PMID: 36522911 DOI: 10.1364/oe.471450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/19/2022] [Indexed: 06/17/2023]
Abstract
Providing phase stable laser light is important to extend the interrogation time of optical clocks towards many seconds and thus achieve small statistical uncertainties. We report a laser system providing more than 50 µW phase-stabilized UV light at 267.4 nm for an aluminium ion optical clock. The light is generated by frequency-quadrupling a fibre laser at 1069.6 nm in two cascaded non-linear crystals, both in single-pass configuration. In the first stage, a 10 mm long PPLN waveguide crystal converts 1 W fundamental light to more than 0.2 W at 534.8 nm. In the following 50 mm long DKDP crystal, more than 50 µW of light at 267.4 nm are generated. An upper limit for the passive short-term phase stability has been measured by a beat-node measurement with an existing phase-stabilized quadrupling system employing the same source laser. The resulting fractional frequency instability of less than 5×10-17 after 1 s supports lifetime-limited probing of the 27Al+ clock transition, given a sufficiently stable laser source. A further improved stability of the fourth harmonic light is expected through interferometric path length stabilisation of the pump light by back-reflecting it through the entire setup and correcting for frequency deviations. The in-loop error signal indicates an electronically limited instability of 1 × 10-18 at 1 s.
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4
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Shaw JC, Hannig S, McCarron DJ. Stable 2 W continuous-wave 261.5 nm laser for cooling and trapping aluminum monochloride. OPTICS EXPRESS 2021; 29:37140-37149. [PMID: 34808792 DOI: 10.1364/oe.441741] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
We present a high-power tunable deep-ultraviolet (DUV) laser that uses two consecutive cavity enhanced doubling stages with LBO and CLBO crystals to produce the fourth harmonic of an amplified homebuilt external cavity diode laser. The system generates up to 2.75 W of 261.5 nm laser light with a ∼2 W stable steady-state output power and performs second harmonic generation in a largely unexplored high intensity regime in CLBO for continuous wave DUV light. We use this laser to perform fluorescence spectroscopy on the A1Π ← X1Σ+ transition in a cold, slow beam of AlCl molecules and probe the A1Π|v' = 0, J' = 1〉 state hyperfine structure for future laser cooling and trapping experiments. This work demonstrates that the production of tunable, watt-level DUV lasers is becoming routine for a variety of wavelength-specific applications in atomic, molecular and optical physics.
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Zhang X, Kang L, Gong P, Lin Z, Wu Y. Nonlinear Optical Oxythiophosphate Approaching the Good Balance with Wide Ultraviolet Transparency, Strong Second Harmonic Effect, and Large Birefringence. Angew Chem Int Ed Engl 2021; 60:6386-6390. [DOI: 10.1002/anie.202016013] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Indexed: 02/03/2023]
Affiliation(s)
- Xinyuan Zhang
- Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin 300384 China
| | - Lei Kang
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Pifu Gong
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Zheshuai Lin
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yicheng Wu
- Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin 300384 China
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Zhang X, Kang L, Gong P, Lin Z, Wu Y. Nonlinear Optical Oxythiophosphate Approaching the Good Balance with Wide Ultraviolet Transparency, Strong Second Harmonic Effect, and Large Birefringence. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202016013] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xinyuan Zhang
- Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin 300384 China
| | - Lei Kang
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Pifu Gong
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Zheshuai Lin
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China
| | - Yicheng Wu
- Tianjin Key Laboratory of Functional Crystal Materials Institute of Functional Crystals Tianjin University of Technology Tianjin 300384 China
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7
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Dixneuf C, Guiraud G, Ye H, Bardin YV, Goeppner M, Santarelli G, Traynor N. Robust 17 W single-pass second-harmonic-generation at 532 nm and relative-intensity-noise investigation. OPTICS LETTERS 2021; 46:408-411. [PMID: 33449041 DOI: 10.1364/ol.415532] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 12/21/2020] [Indexed: 06/12/2023]
Abstract
We demonstrate a 17 W single-frequency, low-intensity-noise green source at 532 nm, by single-pass second-harmonic generation of a 50 W continuous-wave fiber laser in a 30 mm MgO-doped periodically-poled stoichiometric lithium tantalate crystal. The maximum conversion efficiency is about 37%. A nearly Gaussian beam (M2<1.15 at 15 W) and low wavefront distortion are obtained. The system shows stable behavior over 100 h of uninterrupted operation. The evolution of the relative-intensity-noise transfer from the fundamental to the second harmonic is theoretically and experimentally investigated with high resolution.
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Chen H, Uehara H, Yasuhara R. Compact deep ultraviolet frequency-doubled Tb:LiYF 4 lasers at 272 nm. OPTICS LETTERS 2020; 45:5558-5561. [PMID: 33001946 DOI: 10.1364/ol.404949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 09/02/2020] [Indexed: 06/11/2023]
Abstract
A new laser system has been developed to generate coherent deep ultraviolet (DUV) radiation at 272 nm. The DUV lasers were produced via intra-cavity frequency doubling of the Tb3+:LiYF4 lasers emitting fundamentally at 544 nm. Continuous-wave (cw) and Q-switched operations were performed with a type I phase-matched β-BaB2O4 nonlinear crystal. The cw operation produces 127 mW of averaged DUV output power. Passive Q-switched operation was realized by using Co2+:MgAl2O4 saturable absorbers. At an initial transmittance (excluding Fresnel reflections) of 99% at 544 nm, stable pulsed output at 272 nm with maximum single-pulse energy of 7.6 µJ and peak power of 6.1 W was obtained. Furthermore, by employing a smaller initial transmittance of 94.7%, we achieved maximum averaged DUV output power of 277 mW. The statistically averaged single-pulse DUV energy and peak power were estimated to be around 100 µJ and 320 W, respectively, which indicates great potential for this DUV laser system toward high energy and peak power.
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Jin P, Shi X, Cui X, Jiang Y, Jing Q, Lee MH, Long M, Cao H, Ding H. Tellurium-oxygen group enhanced birefringence in tellurium phosphates: a first-principles investigation. RSC Adv 2020; 10:4087-4094. [PMID: 35492682 PMCID: PMC9049004 DOI: 10.1039/c9ra10653g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 01/08/2020] [Indexed: 11/21/2022] Open
Abstract
Phosphates possess a relatively large UV/DUV cutoff edge, but these compounds usually have very small birefringence. Recently the Te2P2O9 crystal was synthesized and its birefringence was reported to be as large as 0.106 at 1013.98 nm. Herein, we investigated the electronic structure and optical properties of Te2P2O9 using the first-principles method. The obtained results are in good agreement with the experimental values. The Born effective charges and SHG density of Te2P2O9 show that the contribution to the birefringence and SHG response mainly originates from the TeO5 group. The electronic structures and optical response of Ba2TeO(PO4)2 and Te3O3(PO4)2 were also investigated for comparison. The results show that these two tellurium phosphates also possess a large birefringence similar to Te2P2O9. Also, the birefringence originates from the TeO x polyhedrons, which was confirmed by the real-space atom-cutting results and distortion indices.
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Affiliation(s)
- Pengyun Jin
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
| | - Xuerui Shi
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
| | - Xiuhua Cui
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
| | - Yi Jiang
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
| | - Qun Jing
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
| | - Ming-Hsien Lee
- Department of Physics, Tamkang University New Taipei City 25137 Taiwan
| | - Mengqiu Long
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China .,Hunan Key Laboratory of Super Micro-structure and Ultrafast Process, Central South University Changsha 410083 China
| | - Haibin Cao
- Department of Physics, College of Sciences, Shihezi University Shihezi 832000 China
| | - Hanqin Ding
- Institute of Low-dimensional Quantum Materials and Devices, School of Physical Science and Technology, Xinjiang University 666 Shengli Road Urumqi 830046 China
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Burkley Z, Brandt AD, Rasor C, Cooper SF, Yost DC. Highly coherent, watt-level deep-UV radiation via a frequency-quadrupled Yb-fiber laser system. APPLIED OPTICS 2019; 58:1657-1661. [PMID: 30874196 DOI: 10.1364/ao.58.001657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Accepted: 02/06/2019] [Indexed: 06/09/2023]
Abstract
We demonstrate a 1.4 W continuous-wave (CW) laser at 243.1 nm. The radiation is generated through frequency quadrupling the output of a ytterbium-doped fiber amplifier system. which produces >10 W of CW power at 972.5 nm. We demonstrate absolute frequency control by locking the laser to an optical frequency comb and exciting the 1S-2S transition in atomic hydrogen. This frequency-stabilized, high-power deep-UV laser is of significant interest for precision spectroscopy of simple and exotic atoms, two-photon laser cooling of hydrogen, and Raman spectroscopy.
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11
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Han G, Wang Y, Zhang B, Pan S. Fluorooxoborates: Ushering in a New Era of Deep Ultraviolet Nonlinear Optical Materials. Chemistry 2018; 24:17638-17650. [DOI: 10.1002/chem.201802787] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Guopeng Han
- CAS Key Laboratory of Functional Materials and Devices, for Special Environments; Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices; 40-1 South Beijing Road Urumqi 830011 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Ying Wang
- CAS Key Laboratory of Functional Materials and Devices, for Special Environments; Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices; 40-1 South Beijing Road Urumqi 830011 P. R. China
| | - Bingbing Zhang
- CAS Key Laboratory of Functional Materials and Devices, for Special Environments; Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices; 40-1 South Beijing Road Urumqi 830011 P. R. China
| | - Shilie Pan
- CAS Key Laboratory of Functional Materials and Devices, for Special Environments; Xinjiang Technical Institute of Physics & Chemistry of CAS, Xinjiang Key Laboratory of Electronic Information Materials and Devices; 40-1 South Beijing Road Urumqi 830011 P. R. China
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12
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Dietrich T, Piehler S, Rumpel M, Villeval P, Lupinski D, Abdou-Ahmed M, Graf T. Highly-efficient continuous-wave intra-cavity frequency-doubled Yb:LuAG thin-disk laser with 1 kW of output power. OPTICS EXPRESS 2017; 25:4917-4925. [PMID: 28380759 DOI: 10.1364/oe.25.004917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on the generation of continuous-wave, intra-cavity frequency-doubled, multi-mode laser radiation in an Yb:LuAG thin-disk laser. Output powers of up to 1 kW at a wavelength of 515 nm were achieved at an unprecedented optical efficiency of 51.6% with respect to the pumping power of the thin-disk laser. The wavelength stabilization and spectral narrowing as well as the polarization selection, which is necessary for a stable and efficient second-harmonic generation, was achieved by the integration of a diffraction grating into the dielectric end mirror of the cavity, which exhibits a diffraction efficiency of 99.8%. At a frequency-doubled output power of 820 W the peak-to-valley power fluctuations measured during 100 minutes of laser operation amounted to only 8.2 W (1.0%). The beam parameter product of the frequency-doubled output was 3.4 mm·mrad (M2 ≈ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 µm and a NA of 0.2.
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13
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Devi K, Parsa S, Ebrahim-Zadeh M. Continuous-wave, single-pass, single-frequency second-harmonic-generation at 266 nm based on birefringent-multicrystal scheme. OPTICS EXPRESS 2016; 24:8763-8775. [PMID: 27137310 DOI: 10.1364/oe.24.008763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We report the implementation of a compact cascaded multicrystal scheme based on birefringent crystals in critical phase-matching, for the generation of continuous-wave (cw) radiation in the deep ultraviolet (UV). The approach comprises a cascade of 4 single-pass second-harmonic-generation (SHG) stages in β-BaB2O4 (BBO) pumped by a single-frequency cw green source at 532 nm. A deep-UV cw output power of 37.7 mW at 266 nm has been obtained with a high passive power stability of 0.12% rms over more than 4 hours. Characterization and optimization of the system in each stage has been systematically performed. Angular phase-matching acceptance bandwidth under tight focusing in BBO, and spectral properties of the deep-UV radiation, have been studied. Theoretical calculations for SHG in the cascaded scheme based on birefringent phase-matching have been performed, and enhancement in UV power compared to single-stage single-pass scheme are studied. Theoretical comparison of BBO with other potential crystals for deep-UV generation in cascaded multicrystal scheme is also presented.
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14
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Fürst JU, Buse K, Breunig I, Becker P, Liebertz J, Bohatý L. Second-harmonic generation of light at 245 nm in a lithium tetraborate whispering gallery resonator. OPTICS LETTERS 2015; 40:1932-1935. [PMID: 25927751 DOI: 10.1364/ol.40.001932] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A millimeter-sized, monolithic whispering gallery resonator made of a lithium tetraborate, Li2B4O7, crystal was employed for doubly resonant second-harmonic generation with a continuous-wave laser source at 490 nm. An intrinsic quality factor of 2×10(8) was observed at the pump wavelength. A conversion efficiency of 2.2% was attained with 5.9 mW of mode-matched pump power. In the lithium tetraborate resonator, it is feasible to achieve phase-matching of second-harmonic generation for pump wavelengths between 486 and 506 nm.
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15
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Zhuang F, Jungbluth B, Gronloh B, Hoffmann HD, Zhang G. Dual-wavelength, continuous-wave Yb:YAG laser for high-resolution photothermal common-path interferometry. APPLIED OPTICS 2013; 52:5171-5177. [PMID: 23872763 DOI: 10.1364/ao.52.005171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2013] [Accepted: 06/17/2013] [Indexed: 06/02/2023]
Abstract
We present a continuous-wave (CW) intracavity frequency-doubled Yb:YAG laser providing 1030 and 515 nm output simultaneously. This laser system was designed for photothermal common-path interferometry to measure spatially resolved profiles of the linear absorption in dielectric media and coatings for visible or infrared light as well as of the nonlinear absorption for the combination of both. A Z-shape laser cavity was designed, providing a beam waist in which an LBO crystal was located for effective second-harmonic generation (SHG). Suitable frequency conversion parameters and cavity configurations were discussed to achieve the optimal performance of a diode-pumped CW SHG laser. A 12.4 W 1030 nm laser and 5.4 W 515 nm laser were developed simultaneously in our experiment.
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Affiliation(s)
- Fengjiang Zhuang
- Fraunhofer Institute for Laser Technology, Steinbachstrasse 15, Aachen 52074, Germany.
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16
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Zhuang F, Ye N, Huang C, Zhu H, Wei Y, Chen Z, Wang H, Zhang G. Multi-reflected enhancement of fourth harmonic DUV laser generation at 266 nm. OPTICS EXPRESS 2010; 18:25339-25345. [PMID: 21164882 DOI: 10.1364/oe.18.025339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The stable compact operation in the deep ultraviolet laser at 266 nm is reported from a diode-end-pumped acoustic-optic Q-switched Nd:YVO4/KTP/BBO laser. Fourth harmonic is generated by employing multiple reflections of 532 nm light for taking full advantage of the green beam. An ultraviolet laser at 266 nm with average power of 388.5 mW is obtained with a repetition-rate of 20 kHz, a pulse width of about 59.80 ns, and the corresponding optical to optical conversion efficiency of 11.9% from green to UV. High conversion efficiency and a circular spot of 266 nm laser beam have been achieved in an unfocused beam arrangement.
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Affiliation(s)
- Fengjiang Zhuang
- Key Laboratory of Optoelectronic Materials Chemistry and Physics, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou, Fujian 350002, China
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Meier T, Willke B, Danzmann K. Continuous-wave single-frequency 532 nm laser source emitting 130 W into the fundamental transversal mode. OPTICS LETTERS 2010; 35:3742-3744. [PMID: 21081982 DOI: 10.1364/ol.35.003742] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The nonlinear effect of second-harmonic generation is an efficient way to realize high-power green laser sources. But when scaling up the harmonic power, many setups reported in the literature have been limited by conversion efficiency degradation or the fundamental laser power. Here we report on the generation of 134 W of cw laser light at a wavelength of 532 nm from a fundamental power of 149 W by second-harmonic generation in an external optical resonator comprising a lithium triborate crystal. The external conversion efficiency was 90%. The harmonic light consisted of a single spectral line. At least 97% of it was emitted into the fundamental transversal mode.
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Affiliation(s)
- Tobias Meier
- Max-Planck-Institute for Gravitational Physics, Albert-Einstein-Institute, and Institut für Gravitationsphysik, Leibniz Universität Hannover, Callinstrasse 38, D-30167 Hannover, Germany.
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18
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Cha YH, Ko KH, Lim G, Han JM, Park HM, Kim TS, Jeong DY. Generation of continuous-wave single-frequency 1.5 W 378 nm radiation by frequency doubling of a Ti:sapphire laser. APPLIED OPTICS 2010; 49:1666-1670. [PMID: 20300165 DOI: 10.1364/ao.49.001666] [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 have generated continuous-wave single-frequency 1.5 W 378 nm radiation by frequency doubling a high-power Ti:sapphire laser in an external enhancement cavity. An LBO crystal that is Brewster-cut and antireflection coated on both ends is used for a long-term stable frequency doubling. By optimizing the input coupler's reflectivity, we could generate 1.5 W 378 nm radiation from a 5 W 756 nm Ti:sapphire laser. According to our knowledge, this is the highest CW frequency-doubled power of a Ti:sapphire laser.
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Affiliation(s)
- Yong-Ho Cha
- Quantum Optics Division, Korea Atomic Energy Research Institute, 1045 Daedeok Street Yuseong-Gu, Daejeon 305-353, South Korea.
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19
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Urata Y, Shinozaki T, Wada Y, Kaneda Y, Wada S, Imai S. Deep UV light generation by a fiber/bulk hybrid amplifier at 199 nm. APPLIED OPTICS 2009; 48:1668-1674. [PMID: 19305464 DOI: 10.1364/ao.48.001668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A high-pulse-repetition-frequency (PRF) pulsed light source in the deep ultraviolet region has been realized by a multiple wavelength conversion technique using a hybrid fiber/bulk amplifier system. Output of 199 nm with a power of 50 mW was achieved at 2.4 MHz PRF. The 1 microm amplifier consisted of a Yb-doped fiber amplifier and a Nd-doped YVO(4) amplifier. A 1.5 microm fiber master-oscillator power amplifier was employed as the other fundamental source. The amplifiers exhibited good amplification properties in pulse energy, polarization extinction ratio, and spectrum for nonlinear wavelength conversion.
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Affiliation(s)
- Yoshiharu Urata
- Megaopto Company, Ltd., RIKEN Cooperation Center W415, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan.
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20
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Kaneda Y, Yarborough JM, Li L, Peyghambarian N, Fan L, Hessenius C, Fallahi M, Hader J, Moloney JV, Honda Y, Nishioka M, Shimizu Y, Miyazono K, Shimatani H, Yoshimura M, Mori Y, Kitaoka Y, Sasaki T. Continuous-wave all-solid-state 244 nm deep-ultraviolet laser source by fourth-harmonic generation of an optically pumped semiconductor laser using CsLiB6O10 in an external resonator. OPTICS LETTERS 2008; 33:1705-1707. [PMID: 18670510 DOI: 10.1364/ol.33.001705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report an all-solid-state laser system that generates over 200 mW cw at 244 nm. An optically pumped semiconductor laser is internally frequency doubled to 488 nm. The 488 nm output is coupled to an external resonator, where it is converted to 244 nm using a CsLiB(6)O(10) (CLBO) crystal. The output power is limited by the available power at 488 nm, and no noticeable degradation in output power was observed over a period of several hours.
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Affiliation(s)
- Yushi Kaneda
- College of Optical Sciences, The University of Arizona, 1630 E. University Boulevard, Tucson, Arizona 85721, USA.
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Herskind P, Lindballe J, Clausen C, Sørensen JL, Drewsen M. Second-harmonic generation of light at 544 and 272 nm from an ytterbium-doped distributed-feedback fiber laser. OPTICS LETTERS 2007; 32:268-70. [PMID: 17215941 DOI: 10.1364/ol.32.000268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
We report external cavity second-harmonic generation of light at 544 and 272 nm based on an ytterbium-doped distributed-feedback fiber laser. The nonlinear crystal used to generate light at 544 nm is LiNbO3, and the maximum output of the cavity is 845 mW, corresponding to a conversion efficiency of 55%. In a second frequency-doubling step, using a beta-BaBa2O4 crystal, we generate up to 115 mW of light at 272 nm with a conversion efficiency of 14%.
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Affiliation(s)
- Peter Herskind
- QUANTOP--Danish National Research Foundation Center for Quantum Optics, Department of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark.
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Sakuma J, Asakawa Y, Imahoko T, Obara M. Generation of all-solid-state, high-power continuous-wave 213-nm light based on sum-frequency mixing in CsLiB6O10. OPTICS LETTERS 2004; 29:1096-1098. [PMID: 15181997 DOI: 10.1364/ol.29.001096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Achievement of more than 100 mW of pure continuous-wave deep-ultraviolet radiation at 213 nm has been demonstrated in an efficient all-solid-state laser system that uses two Brewster-cut CsLiB6O10 (CLBO) crystals. The first crystal is used for 266-nm generation by external resonant doubling of 532-nm radiation from a frequency-doubled Nd:YVO4 laser. Subsequent sum-frequency mixing is performed in a second CLBO crystal placed in a diode-pumped Nd:YAG laser cavity to mix the single-pass 266-nm output with circulating 1064-nm light.
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Affiliation(s)
- Jun Sakuma
- R&D Group, Cyber Laser Incorporated, 14-505, Keio Leading-Edge Laboratory of Science and Technology and Department of Electronics and Electrical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
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