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雪崩光电二极管电外差混频技术及其参量优化

吴国秀, 段发阶, 郭浩天

吴国秀, 段发阶, 郭浩天. 雪崩光电二极管电外差混频技术及其参量优化[J]. 激光技术, 2015, 39(6): 802-805. DOI: 10.7510/jgjs.issn.1001-3806.2015.06.015
引用本文: 吴国秀, 段发阶, 郭浩天. 雪崩光电二极管电外差混频技术及其参量优化[J]. 激光技术, 2015, 39(6): 802-805. DOI: 10.7510/jgjs.issn.1001-3806.2015.06.015
WU Guoxiu, DUAN Fajie, GUO Haotian. Optoelectronic heterodyne mixing and parameter optimization of avalanche photodiodes[J]. LASER TECHNOLOGY, 2015, 39(6): 802-805. DOI: 10.7510/jgjs.issn.1001-3806.2015.06.015
Citation: WU Guoxiu, DUAN Fajie, GUO Haotian. Optoelectronic heterodyne mixing and parameter optimization of avalanche photodiodes[J]. LASER TECHNOLOGY, 2015, 39(6): 802-805. DOI: 10.7510/jgjs.issn.1001-3806.2015.06.015

雪崩光电二极管电外差混频技术及其参量优化

基金项目: 

高等学校博士学科点专项科研基金资助项目(20130032110054)

详细信息
    作者简介:

    吴国秀(1990-),男,硕士研究生,主要从事激光测距及激光扫描方面的研究.

    通讯作者:

    段发阶.E-mail:fjduan@tju.edu.cn

  • 中图分类号: TN312+.7

Optoelectronic heterodyne mixing and parameter optimization of avalanche photodiodes

  • 摘要: 雪崩光电二极管(APD)具有频响宽、灵敏度高的优点,在激光测距中有重要应用.为了分析APD电外差混频技术对系统信噪比的影响,建立了APD的数学模型,仿真分析了偏置电压直流分量与信噪比的关系,以及APD击穿电压变化时对信噪比的影响.结果表明,APD电外差混频技术会降低APD输出信号的信噪比,但它降低了后续电路处理带宽,有利于系统整体信噪比的提升;当APD输入光信号较微弱时,采用电外差混频技术,可有效提高系统整体的信噪比.
    Abstract: Avalanche photodiode (APD) have been widely applied in laser ranging systems for high sensitivity and broad bandwidth. Based on the avalanche effect of an APD, adding a local oscillator signal to the APD bias voltage, optoelectronic heterodyne mixing is to make down converter of signal into realization. In order to analyze the effect of APD optoelectronic heterodyne mixing on signal-to-noise ratio (SNR) of a system, the mathematical model of an APD was built. The relationship between direct-current component of the bias voltage and SNR and the effect of APD breakdown voltage change on SNR were analyzed by simulation. The results show that SNR of the APD output signal is reduced by optoelectronic heterodyne mixing, however, the bandwidth of subsequent circuit is reduced too, which can improve SNR of the whole system. When the input signal of an APD is weak, optoelectronic heterodyne mixing of the APD can improve the SNR of the system.
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    其他类型引用(8)

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  • 被引次数: 13
出版历程
  • 收稿日期:  2014-09-21
  • 修回日期:  2014-10-08
  • 发布日期:  2015-11-24

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