Noise Suppression Techniques in Balanced Receiver

Authored by: Le Nguyen Binh

Noises in Optical Communications and Photonic Systems

Print publication date:  November  2016
Online publication date:  November  2016

Print ISBN: 9781482246940
eBook ISBN: 9781315372747
Adobe ISBN:

10.1201/9781315372747-6

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Abstract

It has been shown that a balanced optical receiver can suppress the excess noise intensity generated from the local oscillator (LO) [13]. In a balanced receiver, an optical coupler is employed to mix a weak optical signal with a LO field of average powers of Es2 and EL2, respectively. Figure 5.1 shows the generic diagram of a balanced optical receiver under a coherent detection scheme in which two photodetectors and amplifiers are operating in a push–pull mode. Figure 5.1 Generic block diagram of a coherent balanced detector optical receiver.

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