强双折射光纤中暗孤子的传输特性研究

从光纤双折射参量、背景光宽度、孤子脉冲宽度三方面探讨暗孤子在双折射光纤中远距离传输特性研究表明:相对于亮孤子,暗孤子对光纤双折射的自适应能力较弱;背景光宽度越大,暗脉冲与背景光对比度越好,暗孤子越能保持原来黑孤子状态;暗孤子脉冲宽度越大,偏振脉冲之间的差分群时延越大,诱导的灰孤子震荡结构越明显,越不利于暗孤子远距离传输.

Propagation Properties of Polarized Dark Solitons in Birefringent Fibers

The propagation properties of dark solitons in birefringent fibers are studied on birefringence, the width of finite-width background and pulse width. It is found that polarized dark solitons are less robust to birefringence than that of bright solitons. The more is the width of background, the more is the contract ratio between dark solitons and background . Dark solitons with larger finite-width background can main the shape of black solitons in the transmission. When dark solitons become wider, the differential group delay becomes larger and the induced gray-solitons-oscillation construction becomes more obvious. It is not beneficial to the propagation of dark solitons in long transmission.