Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Absolute measurement of photodetector quantum efficiency based on spontaneous parametric down-conversion biphoton field

Liqun Sun, Yanpeng Zhang, Tiantong Tang, Zhaojin Yang, Xiqi Hou

Published Nov 4, 1999• 0 citations

Abstract

A new method of absolute measurement of photodetector quantum efficiency based on spontaneous parametric down- conversion (SPDC) biphoton field is discussed. The process of SPDC is studied theoretically. The single photon detection probability and two-photon coincidence probability are derived and the measurement principle of photodetectors is explained. An experimental system has been set up. The quantum efficiency of a photon-counting photomultiplier tube was measured, and the results were compared with that obtained using conventional method.

DOI: 10.1117/12.368497

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