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Optical Fiber Communication Conference

Simultaneous Phase Regeneration of CoWDM BPSK Signals by Hybrid Optical Phase Squeezer

Takayuki Kurosu, Mingyi Gao, Shu Namiki

Published Jan 1, 2014• 0 citations
Publisher

Abstract

We propose a new concept of hybrid optical phase squeezer and demonstrate simultaneous phase regeneration of two CoWDM BPSK signals. A gain extinction ratio of 20dB is achieved with a pump power of only 3dBm.
DOI
10.1364/ofc.2014.w3f.5

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A newly proposed concept, which is called hybrid optical phase squeezer (HOPS), achieves multi-level optical phase quantization through coherent addition of two (dual-wave scheme) or three (triple-wave scheme) optical waves exploiting optical parametric processes and electro-optic modulation. The triple-wave scheme enables signal phase regeneration free from phase-to-amplitude noise transfer, which is inevitable in the dual-wave scheme. By using HOPS in the dual-wave scheme, 3-fold phase-noise reduction was achieved for 24-Gb/s QPSK signals with a slight increase of amplitude noise. On the other hand, HOPS in the triple-wave scheme allowed phase regeneration of 12-Gb/s BPSK signal with a suppression of phase-to-amplitude noise transfer.