激光与光电子学进展, 2018, 55 (9): 090401, 网络出版: 2018-09-08
拉曼光谱用热电制冷CCD探测器的设计与性能 
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Design and Performance of Thermoelectric Cooling CCD Detector Used for Raman Spectroscopy
探测器 拉曼分析仪 热电制冷 暗电流噪声 读出噪声 detectors Raman analyzer thermoelectric refrigeration dark current noise readout noise
摘要
设计了一种热电制冷电子耦合元件(CCD)探测器, 并对其特性进行了分析。介绍了该CCD探测器的真空制冷结构、电路、应用软件, 并对各个部分的设计思路、功能、效果进行了详细论述。对该探测器的暗电流噪声和读出噪声进行了测试, 结果表明：在温度为-30 ℃、读出频率为250 kHz的条件下, 该探测器的读出噪声为56 e-, 其暗电流噪声为0.232 e-·(pixel·s)-1; 使用该热电制冷CCD探测器测试空气的自发拉曼散射信号, 在温度为-30 ℃、曝光时间为10 s的条件下, O2、N2和H2O的自发拉曼散射峰的相对高度分别为3303,7768,843 ADU, 其中N2峰的信背比和信噪比分别为14.8和24.9。所设计的CCD探测器具有探测微弱自发拉曼散射信号的能力。
Abstract
A kind of thermoelectric cooling charge-coupled device (CCD) detector is designed and its performance is analyzed. The vacuum refrigeration structure, electric circuit, application software of this CCD detector and their design thoughts, functions and effects are introduced. The dark current noise and the readout noise of this detector are tested. The results show that, the readout noise is 56 e- and the dark current noise is 0.232 e-·(pixel·s)-1 at the temperature of -30 ℃ and the reading frequency of 250 kHz. The spontaneous Raman scattering signal of the ambient atmosphere is obtained by this detector. Under the temperature of -30 ℃ and the exposure time of 10 s, the relative heights of the spontaneous Raman scattering peaks for the O2, N2 and H2O are 3303, 7768, 843 ADU, respectively, in which the signal-background-ratio and the signal-noise-ratio of the N2 peak are 14.8 and 24.9, respectively. The designed CCD detector possesses a detection ability for the weak spontaneous Raman scattering signals.
唐文武, 余安澜, 姚中一, 左都罗, 王新兵. 拉曼光谱用热电制冷CCD探测器的设计与性能[J]. 激光与光电子学进展, 2018, 55(9): 090401. Tang Wenwu, Yu Anlan, Yao Zhongyi, Zuo Duluo, Wang Xinbing. Design and Performance of Thermoelectric Cooling CCD Detector Used for Raman Spectroscopy[J]. Laser & Optoelectronics Progress, 2018, 55(9): 090401.
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