Gaussion pulse variations along nonlinear optical fiber link

• Main Authors: Ching-Hwang Lee, 李清煌
• Other Authors: Jen-Fa Hwang
• Format: Others
• Language: en_US
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/57455423375343014239

碩士 === 國立成功大學 === 電機工程研究所 === 82 === The nonlinear phenomenon in optical fiber communication always distorts the signal and hence the pulse varies along the fiber link. In this article, we discuss the pulse variation affected by three parameters inherented in the optical communication system. These parameters include laser nonchromatic source, fiber dispersion, polarization dispersion. We firstly study the laser linewidth broadening phenomenon , and setup signal and laser models to simulate the pulse variation under different detection schemes. Secondly, in the conventional fiber system, we view the fiber dispersion from another point and find a fundamental restriction on the maximum modulation rate and then we review the Gaussian pulse broadening effect due to fiber dispersion. Finally, we mention the mode dispersion(PMD) resulting from the fiber birefringence. This fact induces a relative time delay between two orthogonal transmission mode. Combining these nonlinear phenomenon, we find the Gaussian pulse broadening effect is not only due to fiber dispersion broadening but also due to the PMD's effect.