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1.引言光伏锑化铟器件是一种性能优良的红外探测器,它的工作波长为1～5.5μm,正好包含了J、H、K、L和M五个重要的大气窗口,量子效率较高η≥50%),噪声等效功率低达1×10~(-15)W·Hz~(1/2)左右,是目前天文观察最常用的红外探测器。光伏锑化铟探测器具有很高的等效输出阻抗,在工作温度(50～77K)下通常为10~8～10~(12)Ω~([1])。高输出阻抗将降低噪声电流,并使NEP降低,但高输出阻抗探测器也对前置放
1. INTRODUCTION Photovoltaic indium antimonide device is a kind of infrared detector with excellent performance. Its operating wavelength is 1 ~ 5.5μm, which contains exactly five important atmospheric windows of J, H, K, L and M. The quantum efficiency High η≥50%), the equivalent power of noise is as low as 1 × 10 ~ (-15) W · Hz ~ (1/2), which is the most commonly used infrared detector for astronomical observation. Photovoltaic indium antimonide detector has a very high equivalent output impedance, usually 10 ~ 8 ~ 10 ~ (12) Ω ~ ([1]) at working temperature (50 ~ 77K). The high output impedance will reduce the noise current and lower the NEP, but the high output impedance detector also pre-amps