Collinear source of polarization-entangled photon pairs at nondegenerate wavelengths
Collinear source of polarization-entangled photon pairs at nondegenerate wavelengths
We report on a simple but highly efficient source of polarization-entangled photon pairs at nondegenerate wavelengths. The fully collinear configuration of the source enables very high coupling efficiency into a single optical mode and allows the use of long nonlinear crystals. With optimized dispersion compensation, it is possible to use …