Journal of Atmospheric and Environmental Optics ›› 2010, Vol. 5 ›› Issue (1): 62-66.

• 论文 • Previous Articles     Next Articles

Study of Quantum Noise of Photodetector

TAO Zong-ming1,2, CHEN Yu1, CHU De-lin1, HU Shun-xing 2   

  1. (1 Section of Physics T&R, Department of Basic Sciences, Artillery Academy, Hefei 230031, China;
     2 Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China)
  • Received:2009-04-12 Revised:2009-05-12 Online:2010-01-28 Published:2010-01-26

Abstract:

Photodetectors are widely used in high tech field. Quantum noise is a main noise source of photodetector, and as an important factor in error analysis it affects and decides detecting sensitivity. The difference and relation between noise and standard deviation are discussed. Based on the analysis of quantum noise sources, it is checked that the emitted photoelectrons have a Poisson distribution, but the multiplied photoelectrons do not obey Poisson statistics. Noise scale factor is introduced and used to describe and process the standard deviation of photoelectrons of photodetector.

Key words: photodetection, noise, Poisson distribution, noise scale factor

CLC Number: