In this chapter, the basis for the design and realisation of optical fibre receivers suited to subcarrier multiplexing (SCM) applications is considered, and circuit noise modelling and optimisation are discussed in detail. A relation has been established that allows the optical receiver's equivalent input noise current spectral density to be calculated by using the noise-matching network's small signal parameters and the front-end noise parameters F_min, Y_opt, and R_n. From this, it is possible to derive the optimum noise matching condition for an optical receiver which differs from the optimum matching for the minimum noise figure.

Inspec keywords: circuit optimisation; optical design techniques; circuit noise; optical fibres; optical receivers; subcarrier multiplexing

Other keywords: noise matching network; small signal parameters; noise figure; optical fibre SCM system; circuit optimisation; front end noise parameters; circuit noise modelling; optical receiver design; input noise current spectral density

Subjects: Optical communication equipment