用于天文观测的InGaAs近红外探测器性能测试方法  

Performance test method of InGaAs near infrared detector for astronomical observation

作　　者：孙佰成 郭杰[1] 许方宇[2] 范明国 龚晓霞[3] 项永生 凌云 张雨辰 SUN Bai-Cheng;GUO Jie;XU Fang-Yu;FAN Ming-Guo;GONG Xiao-Xia;XIANG Yong-Sheng;LING Yun;ZHANG Yu-Chen(Yunnan Key Laboratory of Opto-Electronic Information Technology,Yunnan Normal University,Kunming 650500,China;Yunnan Astronomical Observatory,Chinese Academy of Sciences,Kunming 650216,China;Kunming Institute of Physics,Kunming 650223,China)

机构地区：[1]云南师范大学云南省光电信息技术重点实验室,云南昆明650500 [2]中国科学院云南天文台,云南昆明650216 [3]昆明物理研究所,云南昆明650223

出　　处：《红外与毫米波学报》2022年第6期1002-1008,共7页Journal of Infrared and Millimeter Waves

基　　金：国家自然基金委员会与天文联合基金培育项目(U1931124)。

摘　　要：基于天文红外探测器评价体系,利用改进的“光子转移曲线”测试方法,分别测试了液氮制冷和热电制冷的两款InGaAs近红外探测器的性能。NIRvana-LN光电子与输出数字量的转换因子为0.16ADU/e-,读出噪声实测值是83 e-,远高于标称值15 e-;NIRvana的高、低转换因子分别为1.25ADU/e-和0.097ADU/e-,读出噪声分别为105 e-和380 e-;NIRvana在高转换因子档下暗电流实测值是415 e-/s,大约是标称值的2倍。理论估算云南天文台两米环形望远镜在1.565μm太阳磁场测量时的信号电子数约8800 e-,在实测暗电流4.06 e-/s,像元曝光时间20 ms,读出噪声83.59 e-条件下,NIRvana-LN探测器信噪比为70。Based on the evaluation system of astronomical infrared detectors,the performance of two InGaAs NIR de‐tectors,liquid nitrogen-cooled and thermoelectric-cooled,was tested using a modified"photon transfer curve"tests method.The measured value is 83 e-,which is much higher than the nominal value of 15 e-;the high and low conversion factors of NIRvana are 1.25 ADU/e-and 0.097 ADU/e-,respectively,and the readout noise is 105 e-and 380 e-;the measured value of dark current of NIRvana at the high conversion factor step is 415 e-/s,which is about twice of the nominal value.The theoretical estimate of the signal electron number of the Yunnan Observatory two-meter ring tele‐scope at 1.565μm solar magnetic field measurement is about 8800 e-,and the NIRvana-LN detector signal-to-noise ratio is 70 under the measured dark current of 4.06 e-/s,image exposure time of 20 ms,and readout noise of 83.59 e-.

关 键 词：红外天文 InGaAs红外探测器 转换因子 读出噪声 暗电流 

分 类 号：O434.3[机械工程—光学工程]