锁模光纤激光器中偏振相关输出特性的实验研究  

Experimental Study on Polarization-dependent Output Characteristics in Mode-locked Fiber Laser

作　　者：陈伟成[1,2] 徐文成[2] 

机构地区：[1]佛山科学技术学院物理系,广东佛山528000 [2]华南师范大学信息光电子科技学院,光子信息技术广东省高等学校重点实验室,广东广州510006

出　　处：《半导体光电》2008年第4期493-496,共4页Semiconductor Optoelectronics

基　　金：广东省自然科学基金资助项目(04010397);佛山科学技术学院自然科学基金项目

摘　　要：实验观察到非线性偏振旋转锁模光纤激光器输出的偏振相关的多波长输出现象、脉冲频谱边带及其抑制现象,以及多重偏振态导致的脉冲序列峰值调制现象。分析了这些与偏振相关的输出特性的物理成因,指出多波长锁模脉冲输出现象源于激光器中器件的保偏尾纤提供了多个偏振光程;锁模脉冲频谱边带现象源于由色散波同锁模脉冲内与其偏振态相同的脉冲内部成分干涉的结果,通过调整激光偏振态使锁模脉冲演化成矢量孤子就可消除频谱边带问题;时域脉冲序列的峰值调制现象源于激光器中偏振片周期偏振调制导致的矢量孤子多重偏振态。Observed are multiple wavelength output, spectral sideband and its suppression, and pulse peak modulation of mode-locked pulses in the fiber laser in experiments. The physics mechanisms of these polarization-dependent output phenomena are also discussed. Multiple wavelength output phenomena owe to the multiple optical paths induced by polarization maintaining fiber pigtail of the devices in cavity. Spectral sidebands owe to the interference between dispersive waves and the part of mode-locked pulse with the same polarization states. Spectral sidebands can be suppressed via adjusting polarization states to realize the mode-locked pulses evolving into vector solitons. Temporal pulse peak modulation owes to multiple polarization states of vector solitons induced by polarization modulation of polarizer in the laser.

关 键 词：光纤激光器 非线性偏振旋转锁模 偏振相关现象 

分 类 号：TN253[电子电信—物理电子学]