激光技术
激光技術
격광기술
LASER TECHNOLOGY
2015年
1期
46-49
,共4页
刘兵%陶炜%柯尊贵%冯力天%袁菲%李晓峰
劉兵%陶煒%柯尊貴%馮力天%袁菲%李曉峰
류병%도위%가존귀%풍력천%원비%리효봉
激光技术%探测器%平衡式相干探测%相干激光雷达%多普勒频移
激光技術%探測器%平衡式相榦探測%相榦激光雷達%多普勒頻移
격광기술%탐측기%평형식상간탐측%상간격광뢰체%다보륵빈이
laser technique%detector%balance coherent detection%coherent lidar%Doppler frequency shift
为了分析影响平衡式相干探测信噪比的因素，采用数学模型推导了平衡式相干探测原理和信噪比公式，分析了影响平衡式相干探测信噪比的因素，研制了用于相干激光雷达信号接收的平衡式激光探测器，并通过相干雷达样机，完成了气溶胶粒子发生米氏散射回波信号的探测。结果表明，研制的平衡式激光探测器具有非常低的噪声和高探测灵敏度特性，能较好地探测出大气中气溶胶粒子发生米氏散射的激光回波信号。
為瞭分析影響平衡式相榦探測信譟比的因素，採用數學模型推導瞭平衡式相榦探測原理和信譟比公式，分析瞭影響平衡式相榦探測信譟比的因素，研製瞭用于相榦激光雷達信號接收的平衡式激光探測器，併通過相榦雷達樣機，完成瞭氣溶膠粒子髮生米氏散射迴波信號的探測。結果錶明，研製的平衡式激光探測器具有非常低的譟聲和高探測靈敏度特性，能較好地探測齣大氣中氣溶膠粒子髮生米氏散射的激光迴波信號。
위료분석영향평형식상간탐측신조비적인소，채용수학모형추도료평형식상간탐측원리화신조비공식，분석료영향평형식상간탐측신조비적인소，연제료용우상간격광뢰체신호접수적평형식격광탐측기，병통과상간뢰체양궤，완성료기용효입자발생미씨산사회파신호적탐측。결과표명，연제적평형식격광탐측기구유비상저적조성화고탐측령민도특성，능교호지탐측출대기중기용효입자발생미씨산사적격광회파신호。
In order to analyze the influence factors of signal-to-noise ratio ( SNR ) of balanced coherent detection, balanced coherent detection process was studied and the SNR formula was derived based on the mathematical model.A balanced laser detector for signal receiving was developed, and Mie scattering echo signal of aerosol particles was detected by means of the coherent radar prototype.The results show that balanced laser detector is with very low noise and high sensitivity, and can detect the laser echo signal of Mie scattering of aerosol particles.
