摘要
光纤中的非线性效应是限制高功率光纤激光器发展的重要因素。通过抑制激光器时域的不稳定性(自脉冲现象),可以提升非线性效应的阈值。基于全光纤化的谐振腔引入了简单的光纤珐珀腔,使噪声抖动降至原先的1/3,并实现了自脉冲抑制的稳定的连续激光输出。这种简单的腔结构保持了较高的斜率效率(76.5%),实现了高功率的激光输出(48.7 W泵浦光产生36.5 W激光)。这种腔结构中的全光纤化谐振腔不仅可以用作稳定的连续激光运转激光器,而且还可以用作更高功率光纤放大器的种子,用于限制非线性效应的产生。
The nonlinear noise effect in optical fibers is an important factor to limit the development of high power fiber lasers.The threshold of nonlinear effect can be improved by suppressing the time domain instability（self-pulsing phenomenon） of lasers.On the basis of an all-fiber resonator cavity,a simple fiber Fabry-Perot cavity is incorporated.The noise dither is reduced to one third of its original value and stable continuous laser output suppressed by self-pulsing is realized.This simple cavity structure can maintain a higher slope efficiency（76.5%） and can implement high power laser output（48.7 W bump light can generate 36.5 W laser）.The all fiber resonator cavity in the cavity structure not only can be used as a stable continuous laser,but also can be used as the seed of higher power fiber amplifiers for limiting the generation of nonlinear effect.
出处
《红外》
CAS
2017年第3期12-16,共5页
Infrared
基金
科技部重点专项(2016YFB0402201)
国家自然科学基金项目(U1330134
61308024)
上海市自然科学基金项目(16ZR1440100
16ZR1440200)
江苏省科技支撑计划(BE2014001)
江苏省重点研发计划(BE2016005)
