We show that a parametric downconversion crystal emitting angle resolved coincident photon pairs can be used to measure the absolute quantum efficiency of a photon counting detection system. We have measured the quantum efficiency of a silicon avalanche photodiode, operated in Geiger mode, as a function of operating voltage and compare this to results obtained using a conventional method.
© 1987 Optical Society of America
Original Manuscript: April 3, 1987
Published: November 1, 1987
J. G. Rarity, K. D. Ridley, and P. R. Tapster, "Absolute measurement of detector quantum efficiency using parametric downconversion," Appl. Opt. 26, 4616-4619 (1987)