Spatiotemporal Entanglement in a Noncollinear Optical Parametric Amplifier

The entangled optical beams generated by pulsed parametric down-conversion provide enhanced sensitivity for interferometry and enable quantum computation, but their rich spatiotemporal modal structure lacks a simple analytic model. This study shows that in properly defined curvilinear coordinates combining the frequency transverse wave vector, functions have form thus can be rather easily analyzed measured. authors also show how degree of coupling manipulated varying pump pulse. approach will an impact on engineering solutions optics computing with highly multimode beams.