Experimental observation of double-peak structure of coincidence spectra in ultra-fast Spontaneous Parametric Down Conversion
Dmitry A. Kalashnikov, Mikhail V. Fedorov, Leonid A. Krivitsky
TL;DR
This paper reports the experimental observation of a double-peak structure in the coincidence spectra of ultra-fast SPDC, which is important for quantum state engineering of entangled photon states.
Contribution
First experimental demonstration of the double-peak coincidence spectra structure in ultra-fast SPDC through tailored experimental parameters.
Findings
Double-peak structure observed in coincidence spectra.
Relevance to quantum state engineering of entangled states.
Tailored experimental setup enabled the observation.
Abstract
The requirement on the symmetry of the biphoton wave function results in a double peak structure of the coincidence spectra of Spontaneous Parametric Down Conversion (SPDC) [1]. In this work we report the experimental observation of this effect by careful tailoring parameters of the SPDC crystal, the ultra-fast pump laser, and the measurement setup. The results are shown to be relevant to quantum state engineering of ultra-fast polarization-, or frequency-entangled mixed states.
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