Abstract
A digital correlator using photon-counting receivers is a powerful tool for spectroscopic applications.1 We have constructed a two-channel photon-counting cross correlator using Si avalanche photodiodes (APDs). The use of APDs enables us to improve the time resolution of the system and the quantum efficiency in the near IR region compared with conventional photon-counting systems using photomultipliers. The two-channel coincidence is actually measured by using pairs of photons generated from the spontaneous parametric process. This shows the existence of a correlation between the two channels even though the correlation is degraded by large amounts of loss in these channels.
© 1989 Optical Society of America
PDF ArticleMore Like This
Robert G W Brown and Matthew Daniels
MA4 Quantum-Limited Imaging and Image Processing (QLIP) 1989
A. W. Lightstone and R. J. McIntyre
NIT183 Photon Correlation Techniques and Applications (PCS) 1988
Henri Dautet, Pierre Deschamps, Andrew MacGregor, Robert McIntyre, and Claude Trottier
WA4 Photon Correlation and Scattering (PCS) 1992