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物理学报. 2009, 58(9): 6258-6263.
doi: 10.7498/aps.58.6258.
蒙特卡罗法计算无序激光器的阈值
- 收稿日期: 2008-12-05
- 修回日期: 2009-02-10
- 刊出日期: 2009-09-20
English Abstract
Calculating the threshold of random laser by using Monte Carlo method
- Received Date:
05 December 2008
- Accepted Date:
10 February 2009
- Published Online:
20 September 2009
Abstract: We put forward a model of calculating the threshold gain of random laser, a method for obtaining the distribution function and the relevant random variables according to the mean free path and scattering intensity distribution. The distribution functions are derived for isotropic scattering of light, and then we get the random variables according with the distribution at every scattering. Simulating the random walk of photons in random media by using Monte Carlo method, the threshold of random laser is got. The relationship of the threshold gain to the photon mean free path, the radius of gain zone, the depth of gain zone and light absorption coefficient of non-gain zone is discussed. We make some suggestions to lower the threshold. The theoretical results agree with the experimental data.
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Keywords:
- laser physics /
- threshold /
- Monte Carlo /
- scattering
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