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.

InGaAs 光伏探测器已经开发和评估。将InGaAs与其他探测器进行了比较。我们已经在实验室和望远镜上完成了对一维阵列的评估，但尚未着手开发二维阵列。 [暗电流和量子效率] 分别测量了单通道和16通道阵列InGaAs探测器的暗电流从室温到200K和95K的温度依赖性。暗电流在 95K 时表现出足够的降低，但探测器对于长波长辐射的量子效率在此降低；其截止波长从1.7μm（室温）减小到1.55μm（95K）。 [望远镜评价] 在名古屋大学50cm望远镜上用128通道InGaAs阵列，用光纤和光栅制作光谱仪，光谱分辨率为lambda/DELTAlambdaSOOO。我们得到了1.3μm亮星的光谱，显示Pa beta 吸收和大地吸收。【与其他探测器的比较】开发出可驱动二维阵列的电子系统；其速度和噪声特性足以满足天文用途的探测器阵列。与其他阵列相比，我们得出结论，InGaAs具有低暗电流和高工作温度等优点，但其效率在1.55μm时的下降给天文应用带来了困难。