1210.2306 (M. Minozzi et al.)

Bi-photon propagation control with optimized wavefront by means of
Adaptive Optics    [PDF]

M. Minozzi, S. Bonora, A. V. Sergienko, G. Vallone, P. Villoresi

We present an efficient method to control the spatial modes of entangled photons produced through SPDC process. Bi-photon beam propagation is controlled by a deformable mirror, that shapes a 404nm CW diode laser pump interacting with a nonlinear BBO type-I crystal. Thanks to adaptive optical system, the propagation of 808nm SPDC light produced is optimized over a distance of 2m. The whole system optimization is carried out by a feedback between deformable mirror action and entangled photon coincidence counts. We also demonstrated the improvement of the two-photon coupling into single mode fibers.

View original: http://arxiv.org/abs/1210.2306