物理学报Issue(13)：1-8,8.DOI:10.7498/aps.63.134206
掺铒光纤环形激光器中饱和吸收光栅瞬态特性引发跳模的实验研究*
Exp erimental study on mo de hopping triggered by transient characteristics of saturable absorb er gratings in Er-dop ed fib er ring lasers
摘要
Abstract
It is preferred to insert a saturable absorber grating in Er-doped fiber ring lasers for obtaining a stable single-longitudinal-mode laser operation;however, mode hopping is hardly avoided in various applications. A new mode hopping mechanism is found by utilizing the interferometric phase-demodulation method to transfer the optical frequency hops to the phase changes in real time. The regular mode hops triggered by fast cavity-length modulation are measured, and the characteristics and the origin of the mode hopping are obtained. Experimental results show that this kind of mode hopping, usually occurring between two neighboring longitudinal modes, may appear near the maximum slope of the modulation curve, and the laser frequency with shift about the space of the longitudinal modes before mode hopping. In addition, both the threshold frequency of the optical frequency modulation and the minimal frequency shift, which can triggered a mode hop, increase with the pump power at the same modulation amplitude. These experimental results can provide the stable operation condition if vibration or modulation exists, and they are helpful for optimal designing of the isolated assemblage or determining the operation range under the modulation condition.关键词
光纤激光器/跳模/饱和吸收/动态光栅Key words
fiber laser/mode hopping/saturable absorber/dynamical gratings引用本文复制引用
熊水东,徐攀,马明祥,胡正良,胡永明..掺铒光纤环形激光器中饱和吸收光栅瞬态特性引发跳模的实验研究*[J].物理学报,2014,(13):1-8,8.基金项目
国家自然科学基金(批准号:60908004,11274384)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos.60908004,11274384) （批准号:60908004,11274384）
