Coating processes – Optical element produced
350 9611, 350 9612, 350 9613, G02B 612
An optical waveguide comprises two out-diffused optical waveguide sections an in-diffused optical waveguide section, and two narrow transition region intimately connecting the out-diffused waveguide sections and the in-diffused waveguide section. This waveguide structure can decrease the level of in-plane scattering caused by surface irregularities and reduce the difficulty of coupling light into and out of the waveguide. The structure can be made to perform as a transverse magnetic mode filter and increase the intensity of light focussed into the guide beyond the limits imposed by the optical damage resistance of a strictly in-diffused waveguide.
patent: 4056304 (1977-11-01), Phillips
Gregoris Dennis J.
Ristic Velimir M.
Her Majesty the Queen in Right of Canada, as represented by the
Rehberg John T.
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