Abstract
We theoretically and numerically investigate the performance of tilted Bragg gratings in planar waveguides, fabricated by direct UV writing in photosensitive silica, to couple light out of a chip. An analytic expression is derived for the coupling efficiency and validated numerically by finite element simulations. Using the analytic result, we can design gratings to generate output beams in free space of any specific shape and calculate their overall power coupling efficiency. Our simulations indicate that for currently achievable grating index contrasts devices of millimeter length are most suitable for this technology.
Funder
Engineering and Physical Sciences Research Council
Innovate UK
Subject
Atomic and Molecular Physics, and Optics
Cited by
1 articles.
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1. Arbitrary 3D Beam Delivery from Planar Optical Waveguides for Quantum Technology;2023 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC);2023-06-26