Simultaneous all-optical phase noise mitigation and automatically locked homodyne reception of an incoming QPSK data signal

Authors

A. Mohajerin-Ariaei, M. Ziyadi, A. Almaiman, Y. Cao, F. Alishahi, M. R. Chitgarha, A. Fallahpour, J.-Y. Yang, C. Bao, P. Liao, B. Shamee, Y. Akasaka, M. Sekiya, J. D. Touch, M. Tur, C. Langrock, M. M. Fejer, A. E. Willner

Abstract

Simultaneous phase noise mitigation and automatic phase/ frequency-locked homodyne reception is demonstrated for a 20–32 Gbaud QPSK signal. A phase quantization func- tion is realized to squeeze the phase noise of the signal by optical wave mixing of the signal, its third-order har- monic, and their corresponding delayed variant conjugates, converting the noisy input into a noise-mitigated signal. In a simultaneous nonlinear process, the noise-mitigated signal is automatically phase- and frequency-locked with a “local” pump laser, avoiding the need for feedback or phase/frequency tracking for homodyne detection. Open eye-diagrams are obtained for in-phase and quadrature- phase components of the signal and ∼2 dB OSNR gain is achieved at BER 10−3.

Journal

Optics Letters

Volume

41

Number

20

Date

10/2016
AttachmentSize
Mohajerin OL20161.85 MB