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Proceedings Paper

Control random laser modes by local pumping
Author(s): Jonathan Andreasen; Christian Vanneste; Li Ge; Hui Cao
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Paper Abstract

A study on the effects of optical gain nonuniformly distributed in one-dimensional random systems is presented. It is demonstrated numerically that even without gain saturation and mode competition, the spatial nonuniformity of gain can cause dramatic and complicated changes to lasing modes. Lasing modes are decomposed in terms of the quasi modes of the passive system to monitor the changes. As the gain distribution changes gradually from uniform to nonuniform, the amount of mode mixing increases. Furthermore, we investigate new lasing modes created by nonuniform gain distributions. We find that new lasing modes may disappear together with existing lasing modes, thereby causing fluctuations in the local density of lasing states.

Paper Details

Date Published: 25 February 2010
PDF: 17 pages
Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759713 (25 February 2010); doi: 10.1117/12.847632
Show Author Affiliations
Jonathan Andreasen, Yale Univ. (United States)
Christian Vanneste, Lab. de Physique de la Matière Condensée (France)
Li Ge, Yale Univ. (United States)
Hui Cao, Yale Univ. (United States)

Published in SPIE Proceedings Vol. 7597:
Physics and Simulation of Optoelectronic Devices XVIII
Bernd Witzigmann; Fritz Henneberger; Yasuhiko Arakawa; Marek Osinski, Editor(s)

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