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英国Allen Clark研究中心制备了在77°K工作的探测度达10~(11)厘米赫~(1/2)瓦~(-1)的10.6微米Pb_xSn_(1-x)Te二极管。峰值响应在12微米和13微米的二极管,它们的探测度比180°视场背景受限值的50％要大。如果二极管加偏压到伏-安特性曲线上的零伏点,那么在70赫到50千赫之间进行测量时1/f噪声就可以略去不计。把二极管装在有效接地电流放大器的直流短路输入端上,就可以得到同样的结果。文内还讨论了这种工作方式用于热成象和CO_2激光探测时的优点。
The Allen Clark Research Center of the United Kingdom prepared a 10.6μm Pb_xSn_ (1-x) Te diode with a detection of 10 ~ (11) cm ~ (1/2) W ~ (-1) at 77 ° K. Peak response is at 12 and 13 micron diodes, which detect more than 50% of the 180 ° field-of-view background. If the diode is biased to a zero volt point on the Volt-Ampere curve, 1 / f noise can be neglected when measuring between 70 Hz and 50 kHz. The same result can be obtained by placing the diode on the DC-to-DC input of an active grounded current amplifier. The article also discusses the advantages of this mode of operation for thermal imaging and CO2 laser detection.