Performance test method of InGaAs near infrared detector for astronomical observation

1.Yunnan Key Laboratory of Opto-Electronic Information Technology,Yunnan Normal University,Kunming 650500,China;2.Yunnan Astronomical Observatory, Chinese Academy of Sciences, Kunming 650216, China;3.Kunming Institute of Physics, Kunming 650223, China

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Fund Projects : National Natural Fund Committee, Joint Astronomy Fund Incubation Program(U1931124)

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    Based on the evaluation system of astronomical infrared detectors, the performance of two InGaAs NIR detectors, 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 telescope at 1.565 μm 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-.

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SUN Bai-Cheng, GUO Jie, XU Fang-Yu, FAN Ming-Guo, GONG Xiao-Xia, XIANG Yong-Sheng, LING Yun, ZHANG Yu-Chen. Performance test method of InGaAs near infrared detector for astronomical observation[J]. Journal of Infrared and Millimeter Waves,2022,41(6):1002~1008

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  • Received:May 26,2022
  • Revised:November 09,2022
  • Adopted:July 01,2022
  • Online: November 07,2022
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