摘要
利用光脉冲在非线性双折射光纤中传播时所遵守的相干耦合非线性薛定谔方程,研究了保偏光纤中偏振方向与双折射轴成任意角度时,在反常色散区和正常色散区所产生的调制不稳定性。结果表明:在反常色散区对于任意的偏振角和任意输入功率的光脉冲都产生调制不稳定性;正常色散区的存在不稳定区域和稳定区域,对应不同的不稳定区域输入临界功率不同,脉冲有不同的增益谱。并且,给出了调制不稳定性增益谱随固有双折射和偏振角的变化关系。
The coherently coupled nonlinear Schrdinger(NLS) equation of the propagation of a light pulse in a birefringence nonlinear fiber has been utilized.We have studied modulation instability in polarization-maintaining fiber not only in anomalous dispersion regime but also in normal dispersion regime when the angel of the polarized direction and the birefringence axes is arbitrary.The results show that modulation instability can be produced when the angel of the polarized direction and the birefringence axes as...
出处
《激光杂志》
CAS
CSCD
北大核心
2006年第5期76-78,共3页
Laser Journal
基金
国家自然科学基金资助项目(60468001)
关键词
任意偏振方向
保偏
矢量调制不稳定性
双折射
arbitrary polarized direction
polarization-maintaining
vector modulation instability
birefringence
