1. 2.79 μm Cr,Er:YSGG laser with a high energy realized by thermal bonding and concave end-face.
- Author
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Chen, Yuwei, Sun, Dunlu, Zhang, Huili, Luo, Jianqiao, Quan, Cong, Han, Zhiyuan, Qiao, Yang, Wang, Zhentao, and Cheng, Maojie
- Subjects
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TEMPERATURE distribution , *FOCAL length , *QUALITY factor , *LENSES , *FIBER lasers , *THERMAL lensing - Abstract
• Cr,Er:YSGG crystal with thermal bonding and concave end-face is pumped by Xenon lamp. • Thermal distribution simulation shows thermal bonding can improve heat dissipation capability. • Thermal focal length indicates concave end-face can compensate thermal lens effect. • High single pulse energy of 3.48 J obtained for the concave thermal bonding Cr,Er:YSGG at 5 Hz. • Maximum energy of 1.155 J and slope efficiency of 3.65 % are achieved for the concave thermal bonding Cr,Er:YSGG at 20 Hz. We demonstrate the influence of thermal bonding and concave end-face on the 2.79 μm laser performance of Cr,Er:YSGG crystal. The simulation results of temperature distribution suggest that the two pure YSGG crystals bonded on the Cr,Er:YSGG as end-caps are beneficial to improve the heat dissipation capability. The experimental results of thermal focal length show that the thermal effects of un-bonding, planar thermal bonding, and concave thermal bonding Cr,Er:YSGG crystals are in descending tendency. The maximum output energies and slope efficiencies for concave thermal bonding Cr,Er:YSGG crystal are 3.480 J, 3.33 %@5 Hz; 2.126 J, 3.65 %@10 Hz; 1.384 J, 3.63 %@15 Hz; 1.155 J, 3.65 %@20 Hz, respectively, and the beam quality factors M x 2/ M y 2 are determined to be 7.68/8.63. The result is much better than the previous work, indicating that the xenon lamp pumped concave thermal bonding Cr,Er:YSGG crystal is a promising method to realize high energy laser output. All the results indicate that the thermal bonding and concave end-faces are promising methods to reduce the thermal effect and improve the laser performance of Cr,Er:YSGG crystal pumped by the xenon lamp. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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