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题名: Stochastic resonance in quantum-well semiconductor lasers
作者: Wang J;  Ma XY;  Bai YM;  Cao L;  Wu DJ
发表日期: 2006
摘要: The quantum well (QW) semiconductor lasers have become main optical sources for optical fibre communication systems because of their higher modulation speed, broader modulation bandwidth and better temperature characteristics. In order to improve the quality of direct-modulation by means of the stochastic resonance (SR) mechanism in QW semiconductor lasers, we investigate the behaviour of the SR in direct-modulated QW semiconductor laser systems. Considering the cross-correlated carrier noise and photon noise, we calculate the power spectrum of the photon density and the signal-to-noise ratio (SNR) of the direct-modulated laser system by using the linear approximation method. The results indicate that the SR always appears in the dependence of the SNR on the bias current density, and is strongly affected by the cross-correlation coefficient of the carrier and photon noises, the frequency of modulation signal, and the photon lifetime in the laser cavity.
KOS主题词: gain
刊名: CHINESE PHYSICS LETTERS
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Wang J; Ma XY; Bai YM; Cao L; Wu DJ .Stochastic resonance in quantum-well semiconductor lasers ,CHINESE PHYSICS LETTERS,2006,23(5):1106-1109
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