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Proceedings Paper

The Dependence Of Feedback Bandwidth On The Spectral Linewidth In External Cavity Semiconductor Lasers For Coherent Lightwave Communication Systems
Author(s): Il-Whan Oh; Harish R. D. Sunak
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Paper 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 R3. 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 R2, R3, 1ex is made as defined below.

Paper Details

Date Published: 1 January 1987
PDF: 6 pages
Proc. SPIE 0841, Fiber Optic Networks and Coherent Technology in Fiber Optic Systems II, (1 January 1987); doi: 10.1117/12.967605
Show Author Affiliations
Il-Whan Oh, University of Rhode Island (United States)
Harish R. D. Sunak, University of Rhode Island (United States)

Published in SPIE Proceedings Vol. 0841:
Fiber Optic Networks and Coherent Technology in Fiber Optic Systems II
John D. Chipman; Harish R. Sunak, Editor(s)

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