非线性放大环路反射镜锁模低重频全保偏光纤激光器  

Nonlinear Amplifying Loop Mirror Mode-locked All-polarization-maintaining Fiber Laser with Low Repetition Rate

作　　者：梁纯佳 郭亮 欧尚明 张庆茂[1] Liang Chunjia;Guo Liang;Ou Shangming;Zhang Qingmao(School of Information Optoelectric Science and Technology,South China Normal University,Guangzhou,Guangdong 510006,China)

机构地区：[1]华南师范大学信息光电子科技学院,广东广州510006

出　　处：《应用激光》2019年第1期143-148,共6页Applied Laser

基　　金：国家重点研发计划资助项目(项目编号:2017YFB1104500);广东省自然科学基金资助项目(项目编号:2016A030313456);广东省科技资助项目(项目编号:2016B090917002);广东省研究生教育创新计划资助项目(项目编号:2013JDXM23);广州市科技计划资助项目(项目编号:201604040006)

摘　　要：介绍了一种非线性放大环路反射镜锁模的低重复频率振荡腔和两级光纤放大器的全保偏光纤激光器系统。实验结果表明,振荡腔输出是具有极大啁啾的稳定锁模脉冲,脉冲宽度为90.25 ps,对应的傅里叶变换极限为141 fs,实际可压缩到431 fs,中心波长1 064 nm,3 db光谱宽度为10.4 nm。经过两级放大器后脉冲平均功率可放大至2.1 W,使用光栅对进行压缩后输出平均功率为1.5 W,脉冲宽度为417 fs。整个系统不用经过声光调制器降低重频就能获得较低重复频率、高能量的脉冲输出,是提高脉冲能量的一种新的思路,也为锁模激光器的小型化提供了便利。An all polarization-maintaining fiber laser system consisting of a low repetition rate mode-locked oscillator based on nonlinear amplified loop mirror cascaded with two-stage amplifiers are introduced.The experimental result shows that the output of the oscillating cavity is a stable mode-locked pulse with a maximum chirp,the pulse width is 90.25 ps,the corresponding Fourier transform limit is 141 fs,and it can be compressed to 431 fs with a center wavelength of 1064 nm and a 3 db spectral width of 10.4 nm.After the two-stage amplifier,the pulse average power can be amplified to 2.1 W,and the average output power is 1.5 W and the pulse width is 417 fs after compression using the grating pair.The whole system can obtain low repetition rate and high energy pulses output without passing through the acousto-optic modulator,which is a new idea to improve the pulse energy,and also facilitates the miniaturization of the mode-locked laser.

关 键 词：锁模光纤激光器 非线性放大环路反射镜 啁啾脉冲放大器 低重复频率 

分 类 号：TN248[电子电信—物理电子学]