基于耗散孤子共振的纳秒脉冲掺镱全光纤激光器及其倍频  

Ytterbium-Doped Nanosecond-Pulsed All-Fiber Laser Based on Dissipative Soliton Resonance and Its Frequency-Doubling

作　　者：杨铁山[1] 王秀红[1] 孙若愚[1] 李燕苹[1] 程昭晨 李辉辉[1] 师红星[1] 刘江[1] 王璞(指导)[1] 

机构地区：[1]北京工业大学激光工程研究院,国家产学研激光技术中心,北京100124

出　　处：《中国激光》2015年第3期33-38,共6页Chinese Journal of Lasers

基　　金：国家自然科学基金面上项目(61177048,61378088)

摘　　要：报道了一种新型纳秒脉冲532 nm绿光激光器,其基频光为耗散孤子共振（DSR）方波纳秒脉冲、由掺镱光纤激光器得到,该激光器采用了全光纤主振荡功率放大（MOPA）结构设计。利用非线性偏振旋转（NPR）锁模技术,掺镱光纤激光种子源产生了稳定的DSR方波纳秒脉冲激光输出,输出激光的脉冲宽度随抽运功率的改变在3~40 ns之间可调。利用该DSR方波纳秒脉冲激光作为种子源,经过一级非保偏结构掺镱光纤纤芯放大和两级全保偏结构掺镱光纤包层放大之后,得到了平均功率为6.95 W,峰值功率为4.4 k W的脉冲激光输出。利用长度为20 mm的非线性晶体LBO作为频率转换器,得到了平均功率为2.1 W的绿光激光输出,相应的光光转换效率为30.2%。A novel nanosecond-pulsed, frequency-doubled green laser at 532 nm is reported, whose fundamental light is a dissipative soliton resonance（DSR） square-shaped, nanosecond pulse, which is obtained by all-fiber ytterbium-doped laser with master-oscillator power-amplifier（MOPA） system. The ytterbium-doped fiber seed laser generates stable DSR, square-shaped, nanosecond pulse by using nonlinear polarization rotation（NPR） modelocked technology. The pulse width of the fiber laser can be stably turned from 3 ns to 40 ns by just changing the pump power. After one stage non polarization-maintained ytterbium-doped fiber and two stages polarizationmaintained ytterbium-doped fiber amplification, the final output power is 6.95 W, corresponding to a peak power of 4.4 k W. The output of the all-fiber MOPA is launched into a 20 mm-long LBO crystal and a maximum secondharmonic power of 2.1 W is obtained at a fundamental power of 6.95 W with the optical conversion efficiency of30.2%.

关 键 词：激光器 光纤激光器 光纤放大器 线偏振 倍频 耗散孤子共振 

分 类 号：TN248[电子电信—物理电子学]