基于近红外双色探测器的信号采集系统设计
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摘要
针对近红外双色探测器在两种不同工作波段的光谱响应曲线及暗电流,设计了一种基于近红外双色探测器的信号采集系统及采集方法。该系统具有多种电流转电压档位、电压放大档位和滤波电路带宽档位,能够快速进行信号放大和带宽控制;同时通过数字/模拟转换器(D/A)为四级放大电路提供模拟调零信号,可有效消除由光学系统的杂散光和探测器自身的暗电流引起的噪声。该系统具有速率快、噪声低和分辨率高等特点。通过使用这种信号采集系统,光学系统的信噪比、动态范围、最小可测功率等指标参数都能得到提高。
According to the spectral response curves and dark current of a near infrared two-dolor detector in two different operation wavebands,a signal acquisition system based on the near infrared twocolor detector is designed.The system has many current-voltage conversion levels,voltage amplification levels and filter circuit bandwidth levels.It can amplify signals and control bandwidth quickly.Moreover,it provides zero analog signals for four amplify circuits via a Digital-to-Analog(D/A) convertor.This can effectively eliminate the noises caused by the stray light and the dark current of the detector itself.The system has the features of high speed,low noise and high resolution.By using this signal acquisition system,many parameters of the optical system,such as signal-to-noise ratio,dynamic range and minimum measurable power,can be improved.
According to the spectral response curves and dark current of a near infrared two-dolor detector in two different operation wavebands,a signal acquisition system based on the near infrared twocolor detector is designed.The system has many current-voltage conversion levels,voltage amplification levels and filter circuit bandwidth levels.It can amplify signals and control bandwidth quickly.Moreover,it provides zero analog signals for four amplify circuits via a Digital-to-Analog(D/A) convertor.This can effectively eliminate the noises caused by the stray light and the dark current of the detector itself.The system has the features of high speed,low noise and high resolution.By using this signal acquisition system,many parameters of the optical system,such as signal-to-noise ratio,dynamic range and minimum measurable power,can be improved.
引文
[1]刘铁权,但伟.双波段光电探测器[J].半导体光电,2000,3(21):70-72.
[2]张洋.被动红外光谱仪中微弱信号检测技术的研究[D].太原:中北大学,2012.
[3]Sordillo D C,Budansky Y,Sordillo P P,et al.A Novel Approach to Paget's Disease Diagnosisand Monitoring Using Near-infrared Absorption Spectroscopy[C].SPIE,2013,8565:856566.
[4]Gruger H,Knobbe J,Pugner T,et al.Design and Characterization of a Hybrid Integrated MEMS Scanning Grating Spectrometer[C].SPIE,2013,8616(4):455-461.
[5]杨晓娅.微弱光信号检测系统的设计与研究[D].郑州:郑州大学,2014.
[6]杨波.可见拓展的短波红外InGaAs探测器研究[D].上海:中国科学院上海技术物理研究所,2014.
[7]孟庆端,吕衍秋,鲁正雄,等.双色制导用InGaAs探测器低温特性的研究[J].低温物理学报,2010,32(4):295-298.
[8]Chunment D,Tomoya S,Kazuhiro N,et al.Characterization of Interface Statedensity of Threedimensional Si Nanostructure by Charge Pumping Measurement[J].Microelectronics Reliability,2014,54:725-729.
[9]刘铁权,但伟.双波段光电探测器[J].半导体光电,2000,21(3):70-72.
[10]徐晗,卢启鹏,朴仁官.基于锁相放大的近红外光谱信号提取电路研究[J].电子设计,2009,25(8):233-235.
[11]李钊,方勇华,雒静,等.红外微弱信号的放大与调理电路设计[J].大气与环境光学学报,2013,8(5):385-394.
[2]张洋.被动红外光谱仪中微弱信号检测技术的研究[D].太原:中北大学,2012.
[3]Sordillo D C,Budansky Y,Sordillo P P,et al.A Novel Approach to Paget's Disease Diagnosisand Monitoring Using Near-infrared Absorption Spectroscopy[C].SPIE,2013,8565:856566.
[4]Gruger H,Knobbe J,Pugner T,et al.Design and Characterization of a Hybrid Integrated MEMS Scanning Grating Spectrometer[C].SPIE,2013,8616(4):455-461.
[5]杨晓娅.微弱光信号检测系统的设计与研究[D].郑州:郑州大学,2014.
[6]杨波.可见拓展的短波红外InGaAs探测器研究[D].上海:中国科学院上海技术物理研究所,2014.
[7]孟庆端,吕衍秋,鲁正雄,等.双色制导用InGaAs探测器低温特性的研究[J].低温物理学报,2010,32(4):295-298.
[8]Chunment D,Tomoya S,Kazuhiro N,et al.Characterization of Interface Statedensity of Threedimensional Si Nanostructure by Charge Pumping Measurement[J].Microelectronics Reliability,2014,54:725-729.
[9]刘铁权,但伟.双波段光电探测器[J].半导体光电,2000,21(3):70-72.
[10]徐晗,卢启鹏,朴仁官.基于锁相放大的近红外光谱信号提取电路研究[J].电子设计,2009,25(8):233-235.
[11]李钊,方勇华,雒静,等.红外微弱信号的放大与调理电路设计[J].大气与环境光学学报,2013,8(5):385-394.