Optimum optical modulation index of laser transmitters in scm systems

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Optimum optical modulation index of laser transmitters in scm systems

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© The Institution of Electrical Engineers
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An analysis of the optimum optical modulation index of laser transmitters in SCM systems is presented. Nonlinear distortion arising from overmodulation in a laser-limiter combination is studied. A generalised analysis, based on rectangular signal input power spectral density and broadband transmission, is given for the nonlinear noise spectral density. A computer algorithm is developed to generate the optimum modulation index which maximises the received CNR for SCM transmission.

Inspec keywords: optical fibres; multiplexing; optical communication

Other keywords: rectangular signal input power spectral density; broadband transmission; laser-limiter combination; carrier noise ratio; nonlinear noise spectral density; subcarrier multiplexing; generalised analysis; overmodulation; SCM transmission; laser transmitters; SCM systems; computer algorithm; optimum optical modulation index; received CNR maximisation; passive optical network

Subjects: Optical communication; Fibre optics; Integrated switching and transmission systems

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