Nonlinear distortion associated with the phase characteristic of injection-locked lasers (ILLs) employed as non-regenerative repeaters for optical frequency shift keying (FSK) is considered. A compact expression is derived which shows that this phenomenon can have a significant limiting effect on the performance of a system making use of ILLs as repeaters or as receiver preamplifiers.
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O'Byrne et al. (1987) studied this question.
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