Effect of local pumping on random laser modes

Details Effect of local pumping on random laser modes Effect of local pumping on random laser modes

2007-01-17

arxiv.org/abs/physics/0701193v1

Physics

Optics

8 pages, 5 figures

Scientific paper

10.1364/JOSAB.24.000A26

We have developed a numerical method based on the transfer matrix to calculate the quasimodes and lasing modes in one-dimensional random systems. Depending on the relative magnitude of the localization length versus the system size, there are two regimes in which the quasimodes are distinct in spatial profile and frequency distribution. In the presence of uniform gain, the lasing modes have one-to-one correspondence to the quasimodes in both regimes. Local excitation may enhance the weight of a mode within the gain region due to local amplification, especially in a weakly scattering system.

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