Multiphoton correlations in parametric down-conversion and their measurement in 
the pulsed regime

Ivanova, O. A.; Iskhakov, T. Sh.; Penin, A. N.; Chekhova, M. V.

doi:10.1070/QE2006v036n10ABEH013300

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Multiphoton correlations in parametric down-conversion and their measurement in the pulsed regime

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Ivanova, O. A., Iskhakov, T. S., Penin, A. N., & Chekhova, M. V. (2006). Multiphoton correlations in parametric down-conversion and their measurement in the pulsed regime. QUANTUM ELECTRONICS, 36(10), 951-956. doi:10.1070/QE2006v036n10ABEH013300.

Cite as: https://hdl.handle.net/21.11116/0000-0001-DF64-4

Abstract

We consider normalised intensity correlation functions (CFs) of different orders for light emitted via parametric down-conversion (PDC) and their dependence on the number of photons per mode. The main problem in measuring such correlation functions is their extremely small width, which considerably reduces their contrast. It is shown that if the radiation under study is modulated by a periodic sequence of pulses that are short compared to the CF width, no decrease in the contrast occurs. A procedure is proposed for measuring normalised CFs of various orders in the pulsed regime. For nanosecond-pulsed PDC radiation, normalised second-order CF is measured experimentally as a function of the mean photon number.