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

机译:通过相敏放大器降低光纤非线性放大器的噪声

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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
机译:在使用在线掺-光纤放大器(EDFA)的零色散波长附近的光纤传输系统中,传输光纤中四波混频(FWM)引起的光放大器噪声增强会降低信噪比(SNR)过多。从理论上讲,通过实现在线相敏放大器(PSA),可以有效消除传输光纤中FWM对放大器噪声的影响。非线性Schrodinger方程的小信号分析表明,在线PSA系统的SNR限制的传输距离是在线EDFA系统的四倍。 (C)1997年美国眼镜学会

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