The Effect of Spontaneous Emission on AM Noise for Quantum Cascade Laser

CHEN Gui-chu; FAN Guang-han

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The Effect of Spontaneous Emission on AM Noise for Quantum Cascade Laser

paper | 更新时间：2020-08-12

- The Effect of Spontaneous Emission on AM Noise for Quantum Cascade Laser
- Chinese Journal of Luminescence Vol. 30, Issue 3, Pages: 389-393(2009)
- 作者机构：
  
  1. 华南师范大学光电子材料与技术研究所,广东广州,510631
  2. 肇庆学院物理系,广东肇庆,526061
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN248.4
- Received：25 August 2008，
  
  Revised：02 January 1900，
  
  Published Online：30 June 2009，
  
  Published：30 June 2009
- 稿件说明：
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CHEN Gui-chu, FAN Guang-han. The Effect of Spontaneous Emission on AM Noise for Quantum Cascade Laser[J]. Chinese journal of luminescence, 2009, 30(3): 389-393.
DOI：

CHEN Gui-chu, FAN Guang-han. The Effect of Spontaneous Emission on AM Noise for Quantum Cascade Laser[J]. Chinese journal of luminescence, 2009, 30(3): 389-393. DOI：

摘要

为得到量子级联激光器特有的光噪声特性

通过在速率方程中引入Langevin噪声源以及自发辐射因子的方法

在单模与线性增益的情况下讨论了自发辐射因子及与偏置电流等参数与光噪声的强度及带宽等特性之间的关系

计算结果表明

增大自发辐射因子能降低光噪声的强度

增宽光噪声的3-dB截止频率

进一步的研究也表明

自发辐射因子对光噪声的影响与激光器的偏置电流有密切关系

这种影响在偏置电流较小时比较明显

但当偏置电流很大时自发辐射因子对光噪声的影响将变得很弱。

Abstract

The noise properties of quantum cascade laser were investigated by using rate equations

which include the Langevin noise sources and the spontaneous emission factor

to make simulation calculation. The calculated results show that the intensity of noise and the 3dB cut-off frequency width simultaneously decrease

while increasing the spontaneous emission factor. The further research denotes that the spontaneous emission factor takes an obvious effect on the noise properties as the bias current is low

and this effect will be wea-kened by increasing the bias current.

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Keywords

references

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. Strasser G, Gianordoli S, Hvozdara L, et al. GaAs/AlGaAs superlattice quantum cascade lasers at λ≈13 μm [J]. Appl. Phys. Lett.,1999, 75 (10):1345-1347.

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. Toshihiko Baba, Tetsuko Hamano, Fumio Koyama, et al. Spontaneous emission factor of a microcavity DBR surface-emitting laser [J]. IEEE J. Quan. Electron., 1991, 21 (6):1347-1358.

. Li Linlin, Wang Zhiguang, Yang Enche. AM and FM noise of semiconductor laser [J]. Laser of China (中国激光), 1986, 14 (9):528-530 (in Chinese).

. Richard M Williams, James F Kelly, Steven W Sharpea, et al. Spectral and modulation performance of quantum cascade lasers with application to remote sensing [J]. SPIE, 1999, 3758 :11-22.

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