基于全保偏八字腔结构锁模的光纤激光器及其功率放大

采用包层泵浦的全保偏八字腔结构搭建了一种脉宽可调的掺镱锁模光纤激光器,实现了中心波长为1 064nm、重复频率为4.683 MHz、脉冲宽度可调范围为0.8~5ns、对应平均功率范围为74.8~429.7mW的耗散孤子共振方波脉冲输出.腔内无需偏振控制器,仅通过调节泵浦输入即可实现锁模状态的自启动,并能够长时间保持稳定,在剧烈振动条件下亦不会失锁.采用两级光纤放大器进行功率放大,实现了100 W的平均功率输出,峰值功率高达26.68kW.

All-PM "Figure-of-eight" Cavity Mode-locked Fiber Laser and Its Power Amplification

A Yb-doped mode-locked fiber laser with a tunable pulse width was built by using a cladding pumped all-PM(Polarization Maintaining) “figure-of-eight” cavity.The Dissipative Soliton Resonance (DSR) square pulses with a central wavelength of 1 064 nm,a repetition rate of 4.683 MHz,a tunable pulse width range from 0.8 ns to 5 ns and an average power range from 74.8 mW to 429.7 mW,are achieved.There is no polarization controller in the cavity.The mode locking state can be self-started only by adjusting the pump input,and then can be keep stable for a long time,and without lock-lose even under the condition of violent vibration.By using the two stage fiber amplifiers to amplify the power,the laser output with an average power of 100 W and the peak power as high as 26.68 kW is achieved.