TY - JOUR
TI - Ultralow noise, broadband phase-sensitive optical amplifiers, and their applications
AU - Tong, Z.
AU - Lundstrm, C.
AU - Andrekson, P.A.
AU - Karlsson, M.
AU - Bogris, A.
JO - IEEE Journal on Selected Topics in Quantum Electronics
PY - 2012
VL - 18
TODO - 2
SP - 1016-1032
PB - 
SN - 1077-260X, 1558-4542
TODO - 10.1109/JSTQE.2011.2136330
TODO - Broadband gain;  Linear amplification;  Multi-channel;  Noise performance;  Noise-squeezing;  Phase dependent;  Phase regeneration;  Phase-sensitive;  Phase-sensitive amplifiers;  Potential applications, Amplification;  Light amplifiers;  Noise figure;  Optical communication;  Optical switches, Broadband amplifiers
TODO - Frequency nondegenerate phase-sensitive amplifiers (PSAs) have the potential to realize broadband and noiseless amplification. However, the rigorous requirement of phase-and wavelength-locking of the input waves has significantly hampered their progress. In this paper, we review recent research on this type of optical amplifier. This work is based on a copier-PSA scheme, which consists of a parametric phase-insensitive copier followed by one or more PSAs. Broadband gain and noise performance of a fiber-based nondegenerate PSA has been characterized, both theoretically and experimentally. A record-low 1.1 dB noise figure was measured at >26 dB gain, and a clear phase dependent gain was observed. Moreover, potential applications including phase noise squeezing and ultralow noise, multichannel and modulation-format-transparent linear amplification with up to 6dB link noise figure advantage over conventional EDFA-amplified links have been experimentally demonstrated. The prospects and practical challenges of this intriguing amplification technology are also discussed. © 2011 IEEE.
ER -