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Proceedings Paper

Miniature semiconductor ring laser sources for integrated optical circuits
Author(s): Wei Chen; Peter J. R. Laybourn; Andrzej F. Jezierski; Thomas F. Krauss; P. W. Webb
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Paper Abstract

Miniature semiconductor lasers with resonant ring cavities in both heterostructure and quantum well material have been developed at Glasgow. Two laser structures, rib ring laser and polyimide-embedded ring laser, have been investigated. The resonators produced are between 10 and 1 00im in diameter and because of their small size, the longitudial ,mode spacing is increased over that of conventional cleaved-cavity lasers, reducing the numbers of lasing modes in the mode spectrum. But the small structure will cause thermal problems because of the difficulty of heat dissipation. Detailed thermal measurements have been made on the surface of the laser by an infrared thermal imaging technique. The results give a fair qualitative assessment of the thermal behaviour of a ring laser compared to theoretical modelling results, and show that the temperature rise of the lasing ring is excessive at lasing threshold current for the very small ring and narrow rib structure. Increasing the ring diameter, with a shallower or wider rib structure or even a pill-box structure, will improve heat dissipation and reduce threshold current.

Paper Details

Date Published: 1 August 1990
PDF: 6 pages
Proc. SPIE 1280, High Speed Phenomena in Photonic Materials and Optical Bistability, (1 August 1990); doi: 10.1117/12.20672
Show Author Affiliations
Wei Chen, Univ. of Glasgow (United Kingdom)
Peter J. R. Laybourn, Univ. of Glasgow (United Kingdom)
Andrzej F. Jezierski, Univ. of Glasgow (United Kingdom)
Thomas F. Krauss, Univ. of Glasgow (United Kingdom)
P. W. Webb, Univ. of Birmingham (United Kingdom)

Published in SPIE Proceedings Vol. 1280:
High Speed Phenomena in Photonic Materials and Optical Bistability
Dieter Jaeger, Editor(s)

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