Measurements of photon statistics in second-harmonic generation
- 1 March 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 51 (3) , 2530-2536
- https://doi.org/10.1103/physreva.51.2530
Abstract
Statistical properties of second-harmonic photons generated by a single-mode laser operating near threshold are investigated by means of photoelectric counting measurements. It is found that second-harmonic photons display superthermal fluctuations below threshold where pump statistics are thermal. Above threshold, as the pump field becomes coherent, second-harmonic photons approach Poisson statistics. These measurements, interpreted as two-photon statistics of the fundamental beam, provide experimental evidence for the dependence of the fluctuation properties of a light beam on the process of detection.Keywords
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