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Proceedings Paper

Linewidth of monolithic semiconductor ring lasers
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Paper Abstract

In this work we numerically calculate the linewidth of a single-mode monolithic Semiconductor Ring Laser (SRL) operating in the unidirectional regime. A new expression for the SRL linewidth is derived from the conventional Henry's formula, and the importance of different physical parameters is discussed. In particular, the linewidth is mainly determined by the SRL diameter, because the waveguide bending loss have a very strong dependence on the diameter. We show that circular SRLs with diameter smaller than 180 μm are unlikely to be operated CW. As a general rule, the linewidth decreases for increasing SRL diameter, and it varies from 15 MHz for 200 μm diameter down to 1 MHz for 2000 μm diameter.

Paper Details

Date Published: 14 April 2006
PDF: 8 pages
Proc. SPIE 6184, Semiconductor Lasers and Laser Dynamics II, 618429 (14 April 2006); doi: 10.1117/12.665205
Show Author Affiliations
Guido Giuliani, Univ. di Pavia (Italy)
Alessandro Scirè, Univ. de les Illes Balears (Spain)
Marc Sorel, Univ. of Glasgow (United Kingdom)
Silvano Donati, Univ. di Pavia (Italy)

Published in SPIE Proceedings Vol. 6184:
Semiconductor Lasers and Laser Dynamics II
Daan Lenstra; Markus Pessa; Ian H. White, Editor(s)

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