Impact of local oscillator intensity noise on performance of coherent subcarrier multiplexing system using common local oscillator (CLO)
Journal
Electronics Letters
Journal Volume
27
Journal Issue
23
Pages
2133-2135
Date Issued
1991
Author(s)
Lee, Y.-H.
Abstract
The impact of local oscillator intensity noise on the performance of a coherent subcarrier multiplexing (CSCM) system using a common local oscillator (CLO) is analysed. For a given LO power, RIN noise, and thermal noise, the CNR can be expressed in terms of x, the ratio of σsh2 + σth2over σRIN2 and, for x ≪ 1, the CNR decreases as LO power increases; for x ≫ 1, the CNR increases as the LO power increases; as x approaches 1, there exist an optimum value of local oscillator power and a corresponding maximum CNR. For a system with RIN = − 150 dB/Hz, Ps = −20 dBm, P = 0·02, N = 40, NF = 3dB and B = 10 MHz, the (PLO)optis found to be −4 dBm and (CNR)max 22·5 dB. © 1991, The Institution of Electrical Engineers. All rights reserved.
Subjects
Multiplexing; Noise; Optical communication; Oscillators
Type
journal article