High-birefringence direct UV-written waveguides for heralded single-photon sources at telecommunication wavelengths

Matthew T. Posner, T. Hiemstra, Paolo L. Mennea +8

Direct UV-written waveguides are fabricated in silica-on-silicon with birefringence of $(4.9\pm 0.2)\times 10^{-4}$, much greater than previously reported in this platform. We sh…