摘要
为了提高星载云-气溶胶激光雷达在白天的信噪比,采用法布里-珀罗(F-P)固体标准具作为532 nm探测通道窄带滤光器的核心部件。根据F-P标准具的设计指标,对F-P标准具光学组件进行详细设计,确定F-P标准具厚度为131.1179μm,FSR为738 pm,FWHM为38.2 pm,采用“夹层式结构”。详细分析厚度加工误差对F-P标准具滤波性能影响,得出结论:厚度误差值以kλ0/2n(k为整数)变化时,中心波长的最大透过率值以λ0/2n为周期交替出现,无须补偿;厚度误差值在以λ0/2n周期内变化时,必须采用入射角或工作温度补偿方法进行厚度补偿。通过模拟计算可知,该两种补偿方法可以有效地补偿FP标准具由于加工误差带来的中心波长的漂移,实现高精度滤波。
In order to improve the signal-to-noise ratio of the Space-borne Lidar for Cloud-Aerosol during the daytime,the Fabry-Perot(F-P)solid etalon were used as a core component of the narrowband filters for the 532nm detection channel.According to the design index of the FP etalon,the optical components of the FP etalon are designed in detail,and the thickness of the FP etalon is determined to be 131.1179μm,FSR is 738pm,and FWHM is 38.2pm,and the“sandwich structure”is adopted.The influence of F-P etalon thickness processing error on filtering performance is analyzed in detail.It is concluded that when the thickness error value changes by kλ0/2n(k is an integer),the maximum transmittance value of the center wavelength alternates with a period ofλ0/2n without compensation.When the thickness error value changes within a period ofλ0/2n,the incident angle or operating temperature compensation method must be used for thickness compensation.Through simulation calculation,it can be known that the two compensation methods can effectively compensate the drift of the center wavelength of the FP etalon due to processing errors,and achieve high-precision filtering.
作者
李路
邢昆明
赵明
LI Lu;XING Kunmin;ZHAO Min(Faculty of Mechanical and Automotive Engineer , West Anhui University, Lu'an 237012, China;Key Laboratory of Atmospheric Optics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China)
出处
《皖西学院学报》
2021年第5期79-83,共5页
Journal of West Anhui University
基金
皖西学院校级重点项目(WXZR201718)
民用航天“十三五”技术预先研究项目(D040103)。
