Control random laser modes by local pumping

Jonathan Andreasen; Christian Vanneste; Li Ge; Hui Cao

doi:10.1117/12.847632

25 February 2010 Control random laser modes by local pumping

Jonathan Andreasen, Christian Vanneste, Li Ge, Hui Cao

Proceedings Volume 7597, Physics and Simulation of Optoelectronic Devices XVIII; 759713 (2010) https://doi.org/10.1117/12.847632
Event: SPIE OPTO, 2010, San Francisco, California, United States

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.

Citation Download Citation

Jonathan Andreasen, Christian Vanneste, Li Ge, and Hui Cao "Control random laser modes by local pumping", Proc. SPIE 7597, Physics and Simulation of Optoelectronic Devices XVIII, 759713 (25 February 2010); https://doi.org/10.1117/12.847632

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