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European Conference on Optical Communication

Experimental comparison of gain and saturation characteristics of a parametric amplifier in phase-sensitive and phase-insensitive mode

Carl Lundström, Joseph Kakande, Peter A. Andrekson, Zhi Tong, Magnus Karlsson, Periklis Petropoulos, Francesca R. Parmigiani, David John Richardson

Published Jan 1, 2009• 9 citations
OpenAlex

Abstract

We demonstrate a parametric amplifier with precise control of the in-going waves and study gain and saturation properties in both PSA and PIA mode. A PSA gain of 33 dB is achieved.

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Frontiers in Optics•Jan 1, 2016•0 citations
We experimentally demonstrate a single-pumped, non-degenerate phase-sensitive parametric amplifier with a precise control of phase and amplitude of the in-going waves and investigate in detail its gain, attenuation and saturation properties in comparison with operation in phase insensitive amplifier (PIA) mode. We experimentally observe the variation of the gain and attenuation as a function of the relative phase, pump power and the signal-idler power ratio. The phase sensitive gain spectrum is studied over a 24 nm symmetrical bandwidth and we achieve a maximum phase sensitive amplification (PSA) gain of 33 dB. A departure from the theoretical maximum attenuation as the gain increases is observed and explained.
We investigate a non-degenerate phase-sensitive amplifier (PSA) operating in gain saturation experimentally and numerically using the three-wave model. The phase-dependent gain and phase-to-phase transfer functions are obtained for different levels of saturation with good agreement between experimental and numerical data when higher-order FWM is small. Moreover, we identify an operating point where the PSA is found to be able to significantly reduce both phase- and amplitude noise simultaneously.