All-optical simultaneous multichannel quadrature phase shift keying signal regeneration based on phase-sensitive amplification

Hongxiang Wang; Qi Wang; Lin Bai; Yuefeng Ji

doi:10.1117/1.OE.57.1.016111

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25 January 2018 All-optical simultaneous multichannel quadrature phase shift keying signal regeneration based on phase-sensitive amplification

Hongxiang Wang, Qi Wang, Lin Bai, Yuefeng Ji

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Optical Engineering, 57(1), 016111 (2018). https://doi.org/10.1117/1.OE.57.1.016111

Abstract

A scheme is proposed to realize the all-optical phase regeneration of four-channel quadrature phase shift keying (QPSK) signal based on phase-sensitive amplification. By utilizing conjugate pump and common pump in a highly nonlinear optical fiber, degenerate four-wave mixing process is observed, and QPSK signals are regenerated. The number of waves is reduced to decrease the cross talk caused by undesired nonlinear interaction during the coherent superposition process. In addition, to avoid the effect of overlapping frequency, frequency spans between pumps and signals are set to be nonintegral multiples. Optical signal-to-noise ratio improvement is validated by bit error rate measurements. Compared with single-channel regeneration, multichannel regeneration brings 0.4-dB OSNR penalty when the value of BER is 10−3, which shows the cross talk in regeneration process is negligible.

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Hongxiang Wang, Qi Wang, Lin Bai, and Yuefeng Ji "All-optical simultaneous multichannel quadrature phase shift keying signal regeneration based on phase-sensitive amplification," Optical Engineering 57(1), 016111 (25 January 2018). https://doi.org/10.1117/1.OE.57.1.016111

Received: 22 July 2017; Accepted: 3 January 2018; Published: 25 January 2018

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