Nd∶YAG single-frequency ring laser without thermal-depolarization loss
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摘要:
在Nd∶YAG侧面泵浦四镜环形腔单纵模激光器内,采用薄膜偏振片反射光束作为输出光束,以消除环形腔内热退偏损耗,提高输出功率及效率。实验表明,该Nd∶YAG环形腔可单向运转并输出单纵模激光,环形腔激光器内无热退偏损耗。在驱动电流为21 A时,环形腔激光器输出5.1 W 1064 nm单纵模激光,输出激光线宽为200 MHz,输出光束为线偏振光。通过采用端面泵浦结构,以及采用对p偏振光反射率与泵浦功率相匹配的薄膜偏振片,激光器单纵模输出功率及效率可望进一步提高。
Abstract:
To eliminate depolarization loss in the side-pumped Nd∶YAG ring resonator single-longitudinal-mode laser,the laser beam reflected by the thin-film-polarizer was used as output of the ring resonator.The experiments show that the ring resonator unidirectional operate and deliver single longitudinal-mode laser beam.There is not depolarization loss in this ring resonator.Under a drive currents of 21A,5.1W 1064 nm single-longitudinal-mode laser beam with a line-width of about 200 MHz was obtained from this ring resonator.The polarization state from the ring resonator is line-polarized light.The output power and the efficiency of the ring resonator can be further increased by use of the end-pumped geometry and the thin-film polarizer with optimum-reflectivity for p-polarized light in the ring resonator.
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杨晓冬,朱伟玲,侯新华.无热退偏损耗Nd∶YAG环形腔单纵模激光器[J].激光与红外,2020,50(10):1196~1199 YANG Xiao-dong, ZHU Wei-ling, HOU Xin-hua. Nd∶YAG single-frequency ring laser without thermal-depolarization loss[J]. LASER & INFRARED,2020,50(10):1196~1199