中国物理B ›› 2006, Vol. 15 ›› Issue (9): 2125-2129.doi: 10.1088/1009-1963/15/9/037

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Influences of quantum noises on direct-modulated properties of 1.3-μm InGaAsP/InP laser diodes

曹力1, 吴大进1, 白一鸣2, 马骁宇3, 王俊4   

  1. (1)Department of Physics, Huazhong University of Science and Technology,Wuhan 430074, China; (2)Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083,China; (3)National Engineering Research Center for Opto-electronic Device,Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083, China; (4)National Engineering Research Center for Opto-electronic Device,Institute of Semiconductors, Chinese Academy of Sciences,Beijing 100083, China;Department of Physics, Huazhong University of Science and Technology,Wuhan 430074, China
  • 收稿日期:2005-10-19 修回日期:2006-05-14 出版日期:2006-09-20 发布日期:2006-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

Influences of quantum noises on direct-modulated properties of 1.3-μm InGaAsP/InP laser diodes

Wang Jun(王俊)a)c)†, Ma Xiao-Yu(马骁宇)a), Bai Yi-Ming(白一鸣)b), Cao Li(曹力)c), and Wu Da-Jin(吴大进)c)   

  1. a National Engineering Research Center for Opto-electronic Device, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; b Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China; c Department of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
  • Received:2005-10-19 Revised:2006-05-14 Online:2006-09-20 Published:2006-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10275025).

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摘要： Due to the zero dispersion point at 1.3μm in optical fibres, 1.3-μm InGaAsP/InP laser diodes have become main light sources in fibre communication systems recently. Influences of quantum noises on direct-modulated properties of single-mode 1.3-μm InGaAsP/InP laser diodes are investigated in this article. Considering the carrier and photon noises and the cross-correlation between the two noises, the power spectrum of the photon density and the signal-to-noise ratio (SNR) of the direct-modulated single-mode laser system are calculated using the linear approximation method. We find that the stochastic resonance (SR) always appears in the dependence of the SNR on the bias current density, and is strongly affected by the cross-correlation coefficient between the carrier and photon noises, the frequency of modulation signal, and the photon lifetime in the laser cavity. Hence, it is promising to use the SR mechanism to enhance the SNR of direct-modulated InGaAsP/InP laser diodes and improve the quality of optical fibre communication systems.

关键词: InGaAsP/InP laser diodes, carrier noise, photon noise, linear approximation method

Abstract: Due to the zero dispersion point at 1.3μm in optical fibres, 1.3-μm InGaAsP/InP laser diodes have become main light sources in fibre communication systems recently. Influences of quantum noises on direct-modulated properties of single-mode 1.3-μm InGaAsP/InP laser diodes are investigated in this article. Considering the carrier and photon noises and the cross-correlation between the two noises, the power spectrum of the photon density and the signal-to-noise ratio (SNR) of the direct-modulated single-mode laser system are calculated using the linear approximation method. We find that the stochastic resonance (SR) always appears in the dependence of the SNR on the bias current density, and is strongly affected by the cross-correlation coefficient between the carrier and photon noises, the frequency of modulation signal, and the photon lifetime in the laser cavity. Hence, it is promising to use the SR mechanism to enhance the SNR of direct-modulated InGaAsP/InP laser diodes and improve the quality of optical fibre communication systems.

Key words: InGaAsP/InP laser diodes, carrier noise, photon noise, linear approximation method

中图分类号:  (Waveguides, transmission lines, striplines)

  • 84.40.Az
41.20.Jb (Electromagnetic wave propagation; radiowave propagation) 71.70.Gm (Exchange interactions)