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Proposal and performance analysis of novel optical homodyne receiver having an optical preamplifier for achieving the receiver sensitivity beyond the shot-noise limit

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1 Author(s)
K. Kikuchi ; Dept. of Electron. Eng., Tokyo Univ., Japan

A novel optical homodyne receiver for binary PSK optical communication systems that can break the receiver sensitivity limit determined from the shot noise is proposed. The receiver consists of the optical preamplifier, the feedforward circuit to reduce the signal-spontaneous beat noise, and the conventional double-balanced homodyne receiver. The operation principle of the receiver and the analysis of the sensitivity are described.<>

Published in:

IEEE Photonics Technology Letters  (Volume:4 ,  Issue: 2 )