Generation of heralded single photons beyond 1100 nm by spontaneous four-wave mixing in a side-stressed femtosecond laser-written waveguide

摘要: We demonstrate a monolithically integrable heralded photon source in femtosecond laser direct written glass waveguide. The generation of pairs with wide wavelength separation requires concomitant large birefringence the normal dispersion regime. Here, by incorporation side-stress tracks, we produce waveguide $1.64\times~10^{-4}$ and propagation loss as low 0.21 dB/cm near 980~nm. measure 300~nm at an internal rate exceeding $5.05\times10^6$/s. second order correlations indicate that generated are strongly non-classical