Methods for Detecting Weak Light Signals
Methods for Detecting Weak Light Signals
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DOI：
10.1364/josa.58.000090
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发表时间：
1968
影响因子：
--
通讯作者：
R. Alfano;N. Ockman
中科院分区：
文献类型：
--
作者：
R. Alfano;N. Ockman
提出了三种低级光电检测技术（即锁定、噪声电压和电子脉冲计数）的理论和实验评估。由 6328 A 运行的 4.2 mW He-Ne 激光器激发的 992 cm−1 苯拉曼带提供了微弱的光信号，该信号由 EMI 9558 A 冷却光电倍增管检测到。发现采用脉冲高度鉴别器的电子脉冲计数方法在信号灵敏度和信噪比方面优于其他方法。
Theoretical and experimental evaluation of three low-level photodetection techniques, namely, lock-in, noise-voltage, and electron-pulse counting are presented. The 992 cm−1 Raman band of benzene excited by a 4.2-mW He–Ne laser operating at 6328 A provided a weak light signal which was detected by an EMI 9558 A, cooled photomultiplier. The electron-pulse-counting method employing a pulse-height discriminator was found to be superior to the other methods with regard to both signal sensitivity and signal-to-noise ratio.