Threshold and saturation properties of two-dimensional random lasers and mode selection
Year: 2006
Type: article
Abstract: Based on the time dependent theory of random lasers, which was established via combining Maxwell equations with the rate equations of a four-level atomic system, the output intensity of lasing modes varying with the pump rate and area as well as the medium's size and shape is simulated for two-dimensional random media by use of the finite difference time domain method. Results show that the pump-rate dependence of the output intensity presents not only a threshold property, but also a saturation property, just like that of the lasing modes in conventional lasers. Based on the dependence of mode property on the medium's and pump's parameters, the mode-selection approaches are proposed for two-dimensional random lasers, which are quite different from those performed in conventional lasers.
Source: Acta Physica Sinica
DOI: 10.7498/aps.55.4123
Authors: Liu Jin-Song, Liu Hai, Wang Chun, Lü Jian-Tao, Fan Ting, Wang Xiao-Dong, 华中科技大学激光技术国家重点实验室，武汉 430074
Language: English
Subfield: Acoustics and Ultrasonics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2254406661