Reduction of fiber-nonlinearity-enhanced amplifier noise by means of phase-sensitive amplifiers

被引：20

作者：

Imajuku, W

Takada, A

机构：

[1] NTT Optical Netwk. Syst. Labs., Yokosuka, Kanagawa 238

来源：

OPTICS LETTERS | 1997年 / 22卷 / 01期

关键词：

D O I：

10.1364/OL.22.000031

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In optical fiber transmission systems near the zero-dispersion wavelength that use in-line erbium-doped fiber amplifiers (EDFA's), the enhancement of optical amplifier noise caused by four-wave mixing (FWM) in transmission fibers degrades signal-to-noise ratio (SNR) excessively. We theoretically show that the enhancement of amplifier noise by the FWM in transmission fibers can be effectively eliminated by implementing in-line phase-sensitive amplifiers (PSA's). Small-signal analysis of the nonlinear Schrodinger equation shows that the transmission distance limited by the SNR of an in-line PSA system is expanded four times more than that of an in-line EDFA system. (C) 1997 Optical Society of America

引用

页码：31 / 33

页数：3

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