Optimizing focused pump beam characteristics for maximum correlated photon pairs in non-collinear degenerate parametric down conversion
Ali Anwar, Nijil Lal, P. Chithrabhanu, GANGIREDDY SALLA, Ravindra Pratap Singh, Shashi Prabhakar · 2015
We investigate the methods to obtain maximum correlated photon pairs generated in Type I spontaneous parametric down conversion (SPDC) with focused pump beam. We study the effect of pump focusing on the photon collection efficiency of signal and idler modes. The correlated photon pair collection efficiency decreases asymptotically with input pump beam focusing parameter [1]. The results obtained here are expected to be useful in designing appropriate optical fibers for generating efficient entangled photon sources for quantum information applications.