Absolute measurement of detector quantum efficiency using parametric downconversion.
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.
Rarity
J G
JG
Ridley
K D
KD
Tapster
P R
PR