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

Abstract

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.

References in corpus (3)

• Modelling and optimization of photon pair sources based on spontaneous parametric down-conversion
• Aberration cancellation in quantum interferometry
• Phase control of a longitudinal momentum entangled photon state by a deformable membrane mirror

Cited by in corpus (5)

• Real-time shaping of entangled photons by classical control and feedback
• An efficient, tunable, and robust source of narrow-band photon pairs at the ${}^{87}$Rb D1 line
• Type I parametric down conversion of highly focused Gaussian beams in finite length crystals
• Pump-shaping of non-collinear and non-degenerate entangled photons
• Towards correcting atmospheric beam wander via pump beam control in a down conversion process