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二极管非制冷红外焦平面阵列(IRFPA)探测器具有广阔的前景,然而它的性能受噪声源的制约,为了得到高性能的探测器,必须研究噪声源并减小其影响.概述了探测器噪声源,量化并研究了不同噪声对探测器的影响,最后得到了二极管IRFPA的性能极限,此外,计算得到了最优的结构参数.理论研究表明温度起伏噪声对应的最小噪声等效温差(NETD)为2.36mK,此时探测器热导为辐射热导,其值为2.06 nW/K.当单元尺寸为25μm×25μm的探测器的正向偏置电流为33μA,占空比为54%时可得到最优NETD为46.5 mK.
Diode uncooled infrared focal plane array (IRFPA) detector has broad prospects, however, its performance is limited by the noise source, in order to get a high performance detector, it is necessary to study the noise source and reduce its influence.It summarizes the detector noise Source, quantify and study the effect of different noise on the detector, and finally get the performance limit of the diode IRFPA, in addition, the optimal structural parameters are calculated.Theoretical study shows that the minimum noise equivalent temperature difference (NETD) Is 2.36 mK, at which time the detector thermal conductance is radiant thermal conductance with a value of 2.06 nW / K. When the detector cell forward bias current is 33 μA and the duty cycle is 54% for a cell size of 25 μm × 25 μm The optimal NETD is 46.5 mK.