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Fan M, Li T, Zhao J, Zhao S, Li G, Yang K, Su L, Ma H, Kränkel C. Continuous wave and ReS 2 passively Q-switched Er : SrF 2 laser at ∼3 μm. OPTICS LETTERS 2018; 43:1726-1729. [PMID: 29652350 DOI: 10.1364/ol.43.001726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 01/14/2018] [Indexed: 06/08/2023]
Abstract
We report on an efficient Er:SrF2 laser at 2.79 μm. A continuous wave output power of 1.06 W was obtained with a slope efficiency of 41%, significantly exceeding the Stokes efficiency of 35%. Stable Q-switched laser operation was realized by using an ReS2 saturable absorber, generating an average output power of 0.58 W with a pulse duration of 508 ns at a repetition rate of 49 kHz, corresponding to a pulse energy of 12.1 μJ.
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Fang Z, Sun D, Luo J, Zhang H, Zhao X, Quan C, Hu L, Cheng M, Zhang Q, Yin S. Thermal analysis and laser performance of a GYSGG/Cr,Er,Pr:GYSGG composite laser crystal operated at 2.79 μm. OPTICS EXPRESS 2017; 25:21349-21357. [PMID: 29041434 DOI: 10.1364/oe.25.021349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 08/19/2017] [Indexed: 06/07/2023]
Abstract
We demonstrate the thermal analysis and laser performance of a GYSGG/Cr,Er,Pr:GYSGG composite crystal. The lifetime ratio of lower and upper levels of Er3+ in Cr,Er,Pr:GYSGG crystal is further reduced due to the optimized doping concentrations. The thermal effect of composite crystal is lower than that of Cr,Er,Pr:GYSGG crystal. A maximum pulse energy 342.8 mJ operated at 5 Hz and 2.79 μm is obtained on the composite crystal, corresponding to electrical-to-optical efficiency of 0.86% and slope efficiency of 1.08%. Under the same condition, these values on the Cr,Er,Pr:GYSGG crystal are only 315.8 mJ, 0.79% and 1.04%, respectively. Moreover, the composite crystal has also a relative high laser beam quality, exhibiting obvious advantage in reducing thermal effects and improving laser performances.
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Ma W, Qian X, Wang J, Liu J, Fan X, Liu J, Su L, Xu J. Highly efficient dual-wavelength mid-infrared CW Laser in diode end-pumped Er:SrF 2 single crystals. Sci Rep 2016; 6:36635. [PMID: 27811994 PMCID: PMC5095644 DOI: 10.1038/srep36635] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 10/17/2016] [Indexed: 11/09/2022] Open
Abstract
The spectral properties and laser performance of Er:SrF2 single crystals were investigated and compared with Er:CaF2. Er:SrF2 crystals have larger absorption cross-sections at the pumping wavelength, larger mid-infrared stimulated emission cross-sections and much longer fluorescence lifetimes of the upper laser level (Er3+:4I11/2 level) than those of Er:CaF2 crystals. Dual-wavelength continuous-wave (CW) lasers around 2.8 μm were demonstrated in both 4at.% and 10at.% Er:SrF2 single crystals under 972 nm laser diode (LD) end pumping. The laser wavelengths are 2789.3 nm and 2791.8 nm in the former, and 2786.4 nm and 2790.7 nm in the latter, respectively. The best laser performance has been demonstrated in lightly doped 4at.% Er:SrF2 with a low threshold of 0.100 W, a high slope efficiency of 22.0%, an maximum output power of 0.483 W.
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Affiliation(s)
- Weiwei Ma
- Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, No.588 Heshuo Road, Shanghai 201899, China.,Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China.,University of Chinese Academy of Sciences, No.19A Yuquan Road, Beijing 100049, China
| | - Xiaobo Qian
- Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, No.588 Heshuo Road, Shanghai 201899, China.,Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jingya Wang
- Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, No.588 Heshuo Road, Shanghai 201899, China.,Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jingjing Liu
- Institute of Data Science and Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Xiuwei Fan
- Institute of Data Science and Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Jie Liu
- Institute of Data Science and Technology, School of Physics and Electronics, Shandong Normal University, Jinan 250014, China
| | - Liangbi Su
- Synthetic Single Crystal Research Center, Shanghai Institute of Ceramics, Chinese Academy of Sciences, No.588 Heshuo Road, Shanghai 201899, China.,Key Laboratory of Transparent and Opto-functional Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Jun Xu
- School of Physics Science and Engineering, Institute for Advanced Study, Tongji University, Shanghai 200092, China
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Zhang H, Sun D, Luo J, Peng F, Fang Z, Zhao X, Cheng M, Zhang Q, Guo Q, Yin S. Growth, structure, and spectroscopic properties of a Cr3+, Tm3+, Ho3+, and Pr3+co-doped LuYAG single crystal for 2.9 μm laser. CrystEngComm 2016. [DOI: 10.1039/c6ce01154c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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