中国激光, 2004, 31 (7): 777, 网络出版: 2006-06-12
准连续双包层光纤激光在周期性极化铌酸锂晶体中倍频产生59 mW绿光
59 mW Green Light Second Harmonic Generation of Quasi-CW Double-Cladding Fiber Laser in Periodically Poled Lithium Niobate
非线性光学 倍频 周期性极化铌酸锂晶体 双包层光纤激光 nonlinear optics frequency doubling periodically poled LiNbO3 double-cladding fiber laser
摘要
将周期性极化晶体和双包层光纤激光相结合获得绿光激光输出,是实现高光束质量、全固化、小型化、高效率绿光激光器的一个非常有前途的方向。采用周期性极化铌酸锂晶体(PPLN)光栅周期6.5 μm,长20 mm,宽5 mm,厚0.5 mm,对种子光注入式掺Yb双包层光纤激光器的准连续输出进行了倍频。研究了倍频光功率和转换效率随抽运光功率的变化关系,保持PPLN的控制温度为193.1℃,在抽运功率为650 mW时,得到6.7%的最高谐波转换效率,在抽运功率为970 mW时,得到了59 mW的最高绿光功率输出。
Abstract
The combination of the double-cladding fiber laser and the periodically poled material provides a compact and high efficiency approach for wavelength conversion with high beam quality. Green laser source is demonstrated using a combination of laser-diode-seeded Yb-doped double-cladding fiber laser and quasi-phase-matched second harmonic generation in periodically poled lithium niobate (PPLN). The uncoated 20-mm-long, 5-mm-wide, 0.5-mm-thick PPLN has 6.5 μm poling period and is temperature stabilized at 193.1℃. The 6.7% conversion efficiency and the 59 mW green light power are achieved with the pump fundamental average power of 650 mW and 970 mW, respectively.
朱晓峥, 周军, 楼祺洪, 董景星, 魏运荣, 陈险峰, 夏宇兴, 陈理军. 准连续双包层光纤激光在周期性极化铌酸锂晶体中倍频产生59 mW绿光[J]. 中国激光, 2004, 31(7): 777. 朱晓峥, 周军, 楼祺洪, 董景星, 魏运荣, 陈险峰, 夏宇兴, 陈理军. 59 mW Green Light Second Harmonic Generation of Quasi-CW Double-Cladding Fiber Laser in Periodically Poled Lithium Niobate[J]. Chinese Journal of Lasers, 2004, 31(7): 777.
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