Title

The dependence of feedback bandwidth on the spectral linewidth in external cavity semiconductor lasers for coherent lightwave communication systems

Document Type

Conference Proceeding

Date of Original Version

1-1-1987

Abstract

We show quantitatively for the first time that the feedback bandwidth is a critical parameter controlling the linewidth in external cavity semiconductor lasers. The external cavity structures can be divided into four categories according to their feedback bandwidth Avf and feedback ratio R. The limit of linewidth narrowing depends on feedback bandwidth rather than the length of external cavity. For very narrow linewidth 10 kHz), the feedback bandwidth required is 100 kHz, provided optimum choice of the other three critical parameters R, R, 1 is made as defined below. © 1987 SPIE.

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

841

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