背景光作用下激光雷達(dá)中Si-APD噪聲特性研究
發(fā)布時間：2019-03-17 09:34
【摘要】：雪崩光電二極管(APD)是一種量子效率高、靈敏度高、頻率響應(yīng)特性好的光電探測器,在激光雷達(dá)、微光探測、光纖通信等領(lǐng)域中有著重要應(yīng)用。大探測視場角脈沖式激光雷達(dá)在白天工作時,背景光通常是其APD探測系統(tǒng)的主要噪聲來源,因此,有必要探究激光雷達(dá)中APD在不同背景光下的噪聲特性,以利于APD最佳倍增工作點的設(shè)定,提高激光雷達(dá)探測信噪比。 論文深入調(diào)研了國內(nèi)外關(guān)于APD工作原理、噪聲成因及理論模型等方面的最新研究成果,以南京理工大學(xué)信息與物理工程系研發(fā)的激光雷達(dá)回波信號接收機(jī)為原型,設(shè)計了C30950E型Si-APD噪聲測量系統(tǒng)。論文使用Tektronix公司生產(chǎn)的TDS5054B型數(shù)字示波器對APD噪聲信號進(jìn)行采樣,并根據(jù)數(shù)字信號處理和數(shù)理統(tǒng)計理論,使用Matlab和Origin軟件對噪聲數(shù)據(jù)進(jìn)行分析,深入研究了不同背景光條件下激光雷達(dá)系統(tǒng)中Si-APD的噪聲特性。 根據(jù)對噪聲數(shù)據(jù)的統(tǒng)計分析,論文給出了在恒定溫度環(huán)境下,APD噪聲電壓有效值與入射背景光功率、APD偏置電壓之間的關(guān)系,探討了飽和現(xiàn)象對APD工作性能的影響；指出APD工作在線性模式時,在本文選定的背景光入射條件下,APD探測系統(tǒng)的噪聲幅度概率分布均為高斯分布；通過對APD噪聲功率譜的分析,明確了噪聲功率譜特征及APD探測系統(tǒng)帶寬。 本次論文研究為激光雷達(dá)光學(xué)接收系統(tǒng)的設(shè)計提供了依據(jù),有利于激光雷達(dá)最佳工作狀態(tài)的確定和信噪比的改善,在激光雷達(dá)領(lǐng)域有重要應(yīng)用。
[Abstract]:Avalanche photodiode (APD) is a kind of photodetector with high quantum efficiency, high sensitivity and good frequency response. It has important applications in the fields of laser radar, low light level detection, optical fiber communication and so on. Background light is usually the main source of noise in the APD detection system of large field of view pulse lidar during daytime work. Therefore, it is necessary to explore the noise characteristics of APD in Lidar under different background light, so it is necessary to explore the noise characteristics of APD in Lidar under different background light. In order to improve the signal-to-noise ratio (SNR) of Lidar detection, the optimal operating point of APD is set. In this paper, the latest research results about the working principle, the cause of noise and the theoretical model of APD at home and abroad are deeply investigated. The prototype is the Lidar echo signal receiver developed by Nanjing University of Science and Technology's Information and physical Engineering Department. A C30950E Si-APD noise measurement system is designed. In this paper, TDS5054B digital oscilloscope produced by Tektronix company is used to sample the APD noise signal. According to the theory of digital signal processing and mathematical statistics, the noise data are analyzed by Matlab and Origin software. In this paper, the noise characteristics of Si-APD in Lidar system under different background light conditions are studied in depth. According to the statistical analysis of the noise data, the relationship between the effective value of the APD noise voltage and the incident background light power and the APD bias voltage under the constant temperature is given, and the influence of saturation on the performance of the APD is discussed. It is pointed out that when APD works in linear mode, the probability distribution of noise amplitude of APD detection system is Gao Si distribution under the background light incidence condition selected in this paper. Through the analysis of APD noise power spectrum, the characteristics of noise power spectrum and the bandwidth of APD detection system are defined. This paper provides a basis for the design of Lidar optical receiving system, which is conducive to the determination of the optimal working state and the improvement of signal-to-noise ratio of lidar. It has important applications in the field of lidar.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN958.98
本文編號：2442160
[Abstract]:Avalanche photodiode (APD) is a kind of photodetector with high quantum efficiency, high sensitivity and good frequency response. It has important applications in the fields of laser radar, low light level detection, optical fiber communication and so on. Background light is usually the main source of noise in the APD detection system of large field of view pulse lidar during daytime work. Therefore, it is necessary to explore the noise characteristics of APD in Lidar under different background light, so it is necessary to explore the noise characteristics of APD in Lidar under different background light. In order to improve the signal-to-noise ratio (SNR) of Lidar detection, the optimal operating point of APD is set. In this paper, the latest research results about the working principle, the cause of noise and the theoretical model of APD at home and abroad are deeply investigated. The prototype is the Lidar echo signal receiver developed by Nanjing University of Science and Technology's Information and physical Engineering Department. A C30950E Si-APD noise measurement system is designed. In this paper, TDS5054B digital oscilloscope produced by Tektronix company is used to sample the APD noise signal. According to the theory of digital signal processing and mathematical statistics, the noise data are analyzed by Matlab and Origin software. In this paper, the noise characteristics of Si-APD in Lidar system under different background light conditions are studied in depth. According to the statistical analysis of the noise data, the relationship between the effective value of the APD noise voltage and the incident background light power and the APD bias voltage under the constant temperature is given, and the influence of saturation on the performance of the APD is discussed. It is pointed out that when APD works in linear mode, the probability distribution of noise amplitude of APD detection system is Gao Si distribution under the background light incidence condition selected in this paper. Through the analysis of APD noise power spectrum, the characteristics of noise power spectrum and the bandwidth of APD detection system are defined. This paper provides a basis for the design of Lidar optical receiving system, which is conducive to the determination of the optimal working state and the improvement of signal-to-noise ratio of lidar. It has important applications in the field of lidar.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN958.98
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 馮金垣,呂華,崔迎超,黃靜;用于單光子探測的APD的低溫特性[J];半導(dǎo)體光電;2004年03期
2 韓立強;楊志強;李志全;王祁;信太克規(guī);;基于自適應(yīng)提升小波的APD探測信號消噪[J];半導(dǎo)體光電;2009年02期
3 許文彪;陳福深;陳苗;肖勇;;基于等效電路模型的雪崩光電探測器特性分析[J];半導(dǎo)體光電;2011年03期
4 陳殿仁,鄒超;APD激光回波信號探測電路系統(tǒng)研究[J];長春理工大學(xué)學(xué)報;2002年02期
5 董進(jìn)武;;機(jī)載激光雷達(dá)的背景輻射抑制技術(shù)研究[J];電光與控制;2009年07期
6 郭賽;丁全心;羊毅;;雪崩光電探測器的噪聲抑制技術(shù)研究[J];電光與控制;2012年03期
7 李賢,徐銘,鄧興成;高背景光噪聲條件下的信號接收技術(shù)[J];電子科技大學(xué)學(xué)報;1998年05期
8 姜燕冰;嚴(yán)惠民;王啟明;;APD探測電路脈沖飽和現(xiàn)象及解決方法[J];光學(xué)儀器;2009年01期
9 崔洋;孫華燕;齊瑩瑩;;基于等效電路模型的APD特性分析[J];四川兵工學(xué)報;2013年08期
10 韓紅;何姜;張勇;趙遠(yuǎn);孫秀冬;;激光雷達(dá)系統(tǒng)背景輻射噪聲的偏振抑制[J];紅外與激光工程;2008年S3期
相關(guān)博士學(xué)位論文 前2條
1 姜燕冰;面陣成像三維激光雷達(dá)[D];浙江大學(xué);2009年
2 寇松峰;APD光子計數(shù)成像技術(shù)研究[D];南京理工大學(xué);2010年
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