基于增益开关LD的高功率脉冲光纤激光器研究

进行了采用1064 nm增益开关LD全光纤高功率光纤放大的实验研究。采用三级级联光纤放大的方式,第一级放大为单包层光纤放大,第二、三级放大为双包层光纤放大。在第三级放大最大泵浦注入功率为45.2 W时,获得了25.3 W的脉冲激光输出,脉冲宽度223 ps,三级放大的光-光效率为55.9%。若后续进一步增大泵浦功率,则有望实现更高功率输出。

Experimental study of high power pulse fiber laser based on gain-switched LD

Experimental study on all-fiber high power pulse fiber laser based on 1064 nm gain-switched laser diode is reported.The method of tri-stage cascade amplification is employed in the experimental.The first stage amplification is single-mode ytterbium-doped fiber,and gain medium of the second and third stage amplification is double-cladding fiber.Average power of 25.3W is obtained under a maximum 45.2 W pump power,and the optical-optical efficiency is 55.9%.The pulse width is 223 ps with center wavelength of 1064 nm.No nonlinear effect is observed by spectrometer,and the SNR is beyond 30 dB.A higher power laser output can be realized as the pump power is further enhanced.