光电工程, 2011, 38 (7): 145, 网络出版: 2011-08-10
电子倍增器件CCD60 噪声特性分析
Noise Performance Analysis of Electron Multiplying Device CCD60
电子倍增CCD 信噪比 等效读出噪声 最佳工作模式 electron multiplying CCD signal-to-noise ratio readout noise driving circuit
摘要
介绍EMCCD 的增益原理,分析了EMCCD 各种噪声的产生机理及相应的抑制方法,并推导出总信比噪模型,从该信噪比模型得出EMCCD 相机的电子倍增过程大大削弱了读出噪声对探测灵敏度的影响;同时为保护电子倍增结构,在满足应用要求的前提下应尽量降低倍增增益;最后通过计算不同工作模式下CCD60 的暗电流噪声和CIC 噪声总和并以此为判断依据,得出CCD60 应工作在反转模式才能得到最小的总噪声,对指导EMCCD硬件设计和应用具有重要意义。
Abstract
The gain principle of EMCCD has been introduced and Total Signal-to-noise Ratio (SNR) formula has been induced based on mechanism of EMCCD noise. The sensitive detection capabilities of EMCCD which can be strongly influenced by readout noise have been weaken by electron multiplication function. It is necessary to minish the multiplication of EMCCD as much as possible to protect electron multiplying structure. CCD60 should be operated at inverted mode to obtain less total noise. This conclusion is a significant direction to EMCCD’s hardware circuits design.
王明富, 杨世洪, 吴钦章, 夏默. 电子倍增器件CCD60 噪声特性分析[J]. 光电工程, 2011, 38(7): 145. WANG Ming-fu, YANG Shi-hong, WU Qin-zhang, XIA Mo. Noise Performance Analysis of Electron Multiplying Device CCD60[J]. Opto-Electronic Engineering, 2011, 38(7): 145.