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Waveguide-based OPO source of entangled photon pairs

Schreiber, Gerhard
Thomas, Abu
Sohler, Wolfgang
Published in New Journal of Physics. 2009, vol. 11, no. 113042
Abstract In this paper, we present a compact source of narrow-band energy–time-entangled photon pairs in the telecom regime based on a Ti-indiffused periodically poled lithium niobate (PPLN) waveguide resonator, i.e. a waveguide with end-face dielectric multi-layer mirrors. This is a monolithic doubly resonant optical parametric oscillator (OPO) far below threshold, which generates photon pairs by spontaneous parametric down-conversion (SPDC) at around 1560 nm with a 117 MHz (0.91 pm)-bandwidth. A coherence time of 2.7 ns is estimated by a time correlation measurement and a high quality of the entangled states is confirmed by a Bell-type experiment. Since highly coherent energy–time-entangled photon pairs in the telecom regime are suitable for long distance transmission and manipulation, this source is well suited to the requirements of quantum communication.
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Other version: http://iopscience.iop.org/1367-2630/11/11/113042/
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POMARICO, Enrico et al. Waveguide-based OPO source of entangled photon pairs. In: New Journal of Physics, 2009, vol. 11, n° 113042. doi: 10.1088/1367-2630/11/11/113042 https://archive-ouverte.unige.ch/unige:11679

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Deposited on : 2010-08-30

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