中国物理B ›› 2002, Vol. 11 ›› Issue (1): 39-43.doi: 10.1088/1009-1963/11/1/309
张书敏1, 徐文成2, 陈伟成2, 罗爱平2, 郭旗2, 刘颂豪2
Xu Wen-Cheng (徐文成)a, Zhang Shu-Min (张书敏)b, Chen Wei-Cheng (陈伟成)a, Luo Ai-Ping (罗爱平)a, Guo Qi (郭旗)a, Liu Song-Hao (刘颂豪)a
摘要: In this paper, we investigate the modulation instability for generating femtosecond pulses in fibres with slowly decreasing dispersion. Higher-order dispersion and higher-order nonlinear effects are taken into account when the continuous wave or quasi-continuous wave evolves into sub-picosecond and femtosecond pulses by modulation instability in the optical fibres. Our research results show that the gain spectrum of the dispersion-decreasing fibres is much wider than that in conventional fibres. The third-order dispersion effect has no contribution to gain spectrum, while the self-steepening effect reduces the maximum value and gain bandwidth, and the Raman self-scattering effect widens the extent to which the modulation instability occurs.
中图分类号: (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)