16 June 2003 Threshold conditions for a random laser mode
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Stimulated emission in Nd0.5La0.5Al3(BO3)4 ceramic random laser was studied at different diameters of the pumped spot d. The developed heuristic model adequately describes the dependence of threshold pumping energy density versus d at d greater or equal to 150 micrometer. At small pumping beam diameter (less than 100 micrometer), very bright and strongly localized emission spot was observed in the center of the pumped area. The spectrum of the bright-spot emission appeared to be similar to that of 'continuum wave' light sources.
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Messaoud Bahoura, Messaoud Bahoura, Natalia Noginova, Natalia Noginova, Kaleem J. Morris, Kaleem J. Morris, Guohua Zhu, Guohua Zhu, Starre Williams, Starre Williams, Jacob Novak, Jacob Novak, Ichesia Fowlkes, Ichesia Fowlkes, Aubry Franz, Aubry Franz, Mikhail A. Noginov, Mikhail A. Noginov, } "Threshold conditions for a random laser mode", Proc. SPIE 4970, Laser Crystals, Glasses, and Nonlinear Materials Growth and Characterization, (16 June 2003); doi: 10.1117/12.501649; https://doi.org/10.1117/12.501649


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