摘要
利用相位调制法研究了调制电压与调制频率对2μm光纤激光受激布里渊散射(SBS)效应抑制效果的影响。实验观测了当SBS产生时,Stokes光的频移约0.17nm,对应激光功率约为120mW。用半波电压为3.5V的电光相位调制器对激光进行相位调制,当调制频率为1MHz和5MHz,调制电压为4V时,SBS阈值分别为250mW和440mW。固定调制电压,提高调制频率,阈值功率持续提升。调制频率大于30MHz时,在允许承受的功率范围内,未观测到SBS产生。
Experiments are conducted based on phase modulation in order to research the suppression on stimulated Brillonin scattering（SBS）effect at different modulation frequencies and voltages.A0.17 nm Stokes frequency shift without phase modulation is observed,and the corresponding SBS threshold is about 120 mW.The phase modulation is realized by an electro-optic modulator whose half-wave voltage is 3.5 V.When the modulation voltage is 4 V and the frequencies are 1 MHz and 5 MHz,respectively,and the SBS threshold power is 250 mW and 440 mW.When the modulation frequency increases,the threshold power continuously increases.When the modulation frequency is higher than 30 MHz,the SBS effect is not observed below the damage limited power.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第10期142-145,共4页
Chinese Journal of Lasers
