Pulsed-squeezed-light generation in a waveguide with second-subharmonic generation and periodic corrugation

Abstract

*Quantum pulsed second-subharmonic generation in a planar waveguide with a small periodic corrugation at the surface is studied. Back-scattering of the interacting fields on the corrugation enhances the nonlinear interaction giving larger values of squeezing. The problem of back-scattering is treated by perturbation theory, using the Fourier transform for non-dispersion propagation, and by numerical approach in the general case. Optimum spectral modes for squeezed-light generation are found using the Bloch-Messiah reduction. Improvement in squeezing and increase of numbers of generated photons are quantified for the corrugation resonating with the fundamental and secondsubharmonic field. Splitting of the generated pulse by the corrugation is predicted.

Waves in spatio-spectral and -temporal coherence of evolving ultra-intense twin beams

“…that arises after defining suitable photon-pair creation and annihilation operators [37]. It quantifies the number of paired modes found in a twin beam.…”

Coherent light in intense spatiospectral twin beams

“…Alternatively, we may quantify the number K of modes via the 'mean photon-pair amplitudes' âs,mlq âi,mlq ϕ as follows [59]:…”