Performance variation of preamplifier integrated cross-phase modulation wavelength converter by internal reflectivity of semiconductor optical amplifiers

Abstract

An analysis of a cross-phase modulation (XPM) wavelength converter integrated with preamplifers for increased input power dynamic range is reported. The performance of the preamplified wavelength converter can be deteriorated by the residual reflectivity of semiconductor optical amplifiers (SOAs) inside the converter. We investigate the tradeoff relationship between the internal reflectivity of SOAs and the performance of the XPM wavelength converter with an integrated preamplifier through bit error rate (BER) calculation. The optimal physical and operating parameters of the preamplified XPM wavelength converter are proposed.

Theoretical investigation of the input power dynamic range enhancement of XPM wavelength converter using a CW holding beam

“…Lastly, we have confirmed the performance of the proposed XPM wavelength converter by bit error rate (BER) estimation. In BER simulation, we have considered four noises (thermal noise, shot noise, spontaneous-spontaneous beat noise, and signal-spontaneous beat noise) (Kazovsky et al 1996;Kang et al 2003). All noises were assumed to be white Gaussian noises having average values of '0', and to be independent from each other statistically.…”