中国激光, 2010, 37 (1): 34, 网络出版: 2010-01-16   

基于周期性畴极化反转掺镁铌酸锂晶体的脉冲光纤激光器抽运的高功率光参量振荡器

PPMgLN-Based High Power Optical Parametric Oscillator Pumped by a Pulsed Fiber Laser
作者单位
浙江大学 现代光学仪器国家重点实验室,浙江大学光电系,浙江 杭州 310027
摘要
报道了研制高功率全光纤化线偏振掺镱脉冲激光器,并用其抽运光参量振荡器(OPO)的研究工作。激光器以光纤化的声光调Q掺镱光纤激光器作为种子源,用大直径双包层保偏光纤作为增益放大介质。在40 kHz重复频率下,得到1064.2 nm处最大23.5 W 的线偏振脉冲激光输出,脉冲宽度约46 ns,偏振消光比(PER)优于10 dB,光束质量因子(M2)约为1.3。利用该全光纤激光器抽运基于周期性畴极化反转掺镁铌酸锂(PPMgLN)晶体的宽带可调谐OPO,在信号光1602 nm通道,获得11.05 W最大光参量输出,其中3168 nm处闲散光功率为3.01 W。OPO能量转换效率为56%,斜率效率为63%。在信号光1508 nm通道,获得9.87 W最大光参量输出,其中3614 nm波长功率为2.75 W。
Abstract
This paper reports the development of our recent work on an all-fiberized high power linearly polarized pulsed Yb fiber laser and using the fiber laser to pump a PPMgLN-based optical parametric oscillator (OPO). The pulsed fiber laser used a fiberized acousto-optic (AO) Q-switched Yb doped fiber laser as a seed and a large mode area double cladding polarization-maintaining fiber as the gain medium. It delivered a linearly polarized pulsed laser output working at 1064.2 nm with an average power of 23.5 W at a repetition rate of 40 kHz. The polarization extinction ratio (PER) of the emission was better than 10 dB. The pulse duration was about 46 ns and the beam quality factor (M2) was about 1.3. Using this all-fiberized laser as a pump source to pump a PPMgLN-based OPO,we obtained a maximum parametric output power of 11.05 W at signal wavelength of 1602 nm with 3.01 W of idler power at 3168 nm. The total conversion efficiency and the slope efficiency was 56% and 63% respectively. At signal wavelength of 1508 nm,a maximum parametric output power of 9.87 W was obtained with 2.75 W idler power at 3614 nm.

杨丁中, 姜培培, 陈滔, 吴波, 孔剑, 沈永行. 基于周期性畴极化反转掺镁铌酸锂晶体的脉冲光纤激光器抽运的高功率光参量振荡器[J]. 中国激光, 2010, 37(1): 34. Yang Dingzhong, Jiang Peipei, Chen Tao, Wu Bo, Kong Jian, Shen Yonghang. PPMgLN-Based High Power Optical Parametric Oscillator Pumped by a Pulsed Fiber Laser[J]. Chinese Journal of Lasers, 2010, 37(1): 34.

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