Theory of the spectral linewidth of N-element coupled-cavity semiconductor lasers

A simple expression is presented for N-element coupled-cavity semiconductor lasers using semiclassical theory which can be used for both passive and active coupled-cavity configurations. The theoretical explanations are in good agreement with the experimental results. However, because of the low-frequency approximation in this analysis (carrier fluctuation is not considered), the theoretical results are not suitable for the noise properties in the high-frequency region.<
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