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Raman-assisted phase sensitive amplifier using a fiber Bragg grating-based tunable phase shifter

Abstract

A low-loss Raman-assisted phase sensitive amplifier (PSA) with a 20dB signal net gain is experimentally demonstrated. The amplitude and phase adjustment for PSA are achieved by using non-uniform Raman gain and a tunable fiber Bragg grating (FBG), respectively. The total component loss of the system is measured to be 8dB. By tuning the FBG central wavelength, (1) an up to 5.6 dB signal gain improvement is obtained; and (2) a 4dB receiver sensitivity enhancement is observed for 20 and 25 Gbaud quadrature phase shift keying signals and a 10 Gbaud 16-quadrature amplitude modulation signal.

© 2018 Optical Society of America

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