基于半导体光放大器的脉宽可调谐暗脉冲激光器  

Pulse Width Tunable Dark Pulse Laser Based on Semiconductor Optical Amplifier

作　　者：潘洪刚[1,2] 于晋龙[1] 王文睿[1] 刘毅[1] 杨恩泽[1] 

机构地区：[1]天津大学电子信息工程学院,天津300072 [2]天津理工大学电子信息工程学院,薄膜电子与通信器件重点实验室,天津300384

出　　处：《光学学报》2015年第5期222-227,共6页Acta Optica Sinica

基　　金：国家973计划(2010CB327603、2010CB315704);国家自然科学基金青年基金(61205061)

摘　　要：利用半导体光放大器（SOA）实现了一种脉宽可调谐的暗脉冲光纤激光器。将基于SOA的光纤激光器的一部分输出反馈注入SOA,由于SOA的非线性偏振旋转效应,输出脉冲经历不同的偏振演化,从而得到暗脉冲输出。通过改变反馈腔长度可以实现暗脉冲的脉宽调谐。分析了半导体光放大器的非线性偏振效应及暗脉冲的产生机理。并在实验中观察到了脉宽可调谐的暗脉冲输出。通过改变反馈腔长,在重复频率不变（11.31 MHz）的条件下,得到了脉宽为5.91~22.34 ns可调的暗脉冲。A dark pulse optical fiber laser with tunable pulse widths based on semiconductor optical amplifier（SOA） is demonstrated. By injecting a portion of light to the SOA from the output of the optical fiber laser, due to the nonlinear polarization rotation of the SOA, the output pulse experience different polarization evolutions and dark pulse is obtained. By changing the length of the feedback cavity, dark pulses with different widths are obtained. Nonlinear polarization rotation effect of the SOA and the mechanism of the dark pulse production are analyzed. In the experiment, the output of the dark pulse with tunable widths is observed. By changing the length of the feedback cavity, under the condition of fixed repetition frequency（11.31 MHz）, dark pulses with tunable widths of 5.91~22.34 ns are obtained.

关 键 词：激光器 半导体光放大器 暗脉冲 非线性偏振旋转 光纤激光器 

分 类 号：TN248.1[电子电信—物理电子学]