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Trial Manufacturing of An InGaAs 2-D Detector Array for Astronomical Observations

用于天文观测的 InGaAs 二维探测器阵列的试制

基本信息

批准号：
09354002
负责人：
NAGATA Tetsuya
金额：
$ 18.88万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09354002/
关键词：
photovoltaic detector integrating amplifier dark current

项目摘要

InGaAs photovoltaic detectors have been developed and evaluated. Comparison of InGaAs with other detectors has been made. We have completed the evaluation of one dimensional arrays in laboratories and at a telescope, and have not proceeded to development of a two dimensional array. [Dark current and quantum efficiency] The temperature dependence of dark current of single and 16-ch array InGaAs detectors was measured from a room temperature to 200K and 95K, respectively. The dark current shows sufficient decrease at 95K, but the quantum efficiency of the detector for long wavelength radiation decreases there ; its cutoff wavelength decreases from 1.7 mum (room temperature) to 1.55 mum (95K) . [Evaluation at telescope] An 128-ch InGaAs array was on the Nagoya University 50-cm telescope with optical fibers and a grating to make a spectrometer with spectral resolution of lambda/DELTAlambdaSOOO.We obtained spectra of bright stars at 1.3 mum, which show the Pa beta absorption and telluric absorptions. [Comparison with other detectors] An electronics system which can drive two dimensional arrays has been developed ; its speed and noise characteristics are sufficient for detector arrays of astronomical use. In comparison with other arrays, we conclude that InGaAs has merits such as low dark current and high operation temperature, but that the decrease of its efficiency at 1.55 mum poses a difficulty in astronomical applications.

对InGaAs光伏探测器进行了研制和评价。并与其它探测器进行了比较。我们已经在实验室和望远镜上完成了一维阵列的评估，还没有开始开发二维阵列。[暗电流和量子效率]从室温到200K和95K，测量了单通道和16通道阵列InGaAs探测器的暗电流与温度的关系。在95K时，暗电流明显减小，但探测器对长波辐射的量子效率降低，其截止波长从室温的1.7um降至1.55um(95K)。[望远镜评价]在名古屋大学的50厘米望远镜上，用128通道的InGaAs阵列，用光纤和一个光栅组成了光谱分辨率为Lambda/DELTAlambdaSOO的光谱仪。我们得到了1.3微米的明亮恒星的光谱，它显示了Paβ吸收和大地吸收。[与其他探测器比较]研制了一种可驱动二维阵列的电子学系统，其速度和噪声特性足以满足天文用探测器阵列的要求。通过与其他阵列的比较，我们得出结论：InGaAs具有暗电流小、工作温度高等优点，但在1.55微米处的效率下降给天文应用带来了困难。