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IEEE/LEOS Summer Topical Meetings

Demonstration of low-noise phase-sensitive amplification and multicasting

Zhi Tong, Stojan Radic

Published Jul 1, 2013• 0 citations
Publisher

Abstract

We review the recent advances in ultra-low noise optical amplification and frequency multicasting relying on two-and four-mode parametric phase-sensitive processes, respectively. Their potential applications in future optical communications and real-time signal processing are discussed.
DOI
10.1109/phosst.2013.6614516

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Optical parametric amplifiers rely on second-order susceptibility (three-wave mixing) or third-order susceptibility (four-wave mixing) in a nonlinear process where the energy of incoming photons is not changed (elastic scattering). In the latter case, two pump photons are converted to a signal and to an idler photon. Under certain conditions, related to the phase evolution of the waves involved, this conversion can be very efficient, resulting in large amplification of an input signal. As the nonlinear process can be very fast, all-optical applications aside from pure amplification are also possible. If the amplifier is implemented in an optical input-phase-sensitive manner, it is possible to amplify a signal wave without excess noise, i.e., with a noise figure of 0 dB. In this paper, we will provide the fundamental concepts and theory of such amplifiers, with a focus on their implementation in highly nonlinear optical fibers relying on four-wave mixing. We will discuss the distinctions between phase-insensitive and phase-sensitive operation and include several experimental results to illustrate their capability. Different applications of parametric amplifiers are also discussed, including their use in optical communication links.