Coherence degradation in the process of supercontinuum generation in an optical fiber

被引：92

作者：

Nakazawa, M ^{[1
]}

Tamura, K ^{[1
]}

Kubota, H ^{[1
]}

Yoshida, E ^{[1
]}

机构：

[1] NTT, Opt Network Syst Labs, Opt Lightwave Commun Lab, Tokai, Ibaraki 31911, Japan

来源：

OPTICAL FIBER TECHNOLOGY | 1998年 / 4卷 / 02期

关键词：

supercontinuum; soliton; four wave mixing; coherence;

D O I：

10.1006/ofte.1998.0253

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Changes in coherence during the process of supercontinuum generation in a dispersion-shifted fiber (DSF), a dispersion-flattened fiber (DFF) and a dispersion-decreasing fiber (DDF) have been investigated in detail for the first time. It is shown that both time and frequency coherence are greatly degraded in DSF and DFF. This is due to the four wave mixing effect caused by self-phase modulation and group velocity dispersion in the presence of amplified spontaneous emission. Such a light pulse may be unsuitable for long-distance, high-speed transmission because it contains timing jitter and amplitude fluctuations. On the other hand, DDF can maintain its coherence as the spectral broadening occurs coherently through adiabatic N = 1 soliton compression. This fiber is useful for ultra-high-speed communication. (C) 1998 Academic Press.

引用

页码：215 / 223

页数：9

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