Signal-to-noise ratio improvement of photon counting using wavelength modulation spectroscopy

被引：39

作者：

Huang, Tao ^{[1
]}

Dong, Shuangli ^{[1
]}

Guo, Xujin ^{[1
]}

Xiao, Liantuan ^{[1
]}

Jia, Suotang ^{[1
]}

机构：

[1] Shanxi Univ, State Key Lab Quantum Opt & Quantum Opt Devices, Coll Phys & Elect Engn, Taiyuan 030006, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 06期

基金：

高等学校博士学科点专项科研基金; 中国国家自然科学基金;

关键词：

D O I：

10.1063/1.2335517

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Photon counting has been widely used in weak light detection. However, the low signal-to-noise ratio (root N, N is the mean counts) significantly limits the detection sensitivity. In this letter, we present a method that uses wavelength modulation spectroscopy to improve the signal-to-noise ratio of photon counting. Five times improvement of signal-to-noise ratio in 1 Hz bandwidth at best has been obtained in 2f harmonic detection. (c) 2006 American Institute of Physics.

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页数：3

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