Generation of polarization-entangled photon pairs by a single crystal interferometric source pumped by femtosecond laser pulses
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- Barbieri, M., Cinelli, C., De Martini, F. et al. Laser Phys. (2006) 16: 1439. doi:10.1134/S1054660X06100069
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Photon pairs highly entangled in polarization have been generated under femtosecond laser pulse excitation by a type-I crystal source operating in a single-arm interferometric scheme. The relevant effects of temporal walkoff existing in these conditions between the ordinary and extraordinary photons were experimentally investigated. By introducing a suitable temporal compensation between the two orthogonal polarization components, highly entangled pulsed states were obtained.