Patent ID: 8844322
Filing Date: 2014-09-30
Classification: G02B,H01S

Abstract:
1. A method for producing a silica waveguide comprising: a. depositing a silica deposition comprising a layer of doped silica nanoparticles on a fused silica (FS) substrate; b. sintering said silica deposition, said layer of doped silica after sintering having a thickness between 5 and 50 μm; c. performing a post sintering laser treatment, comprising heating said silica layer with a laser beam and choosing laser heating conditions to eliminate crystallites and voids and reduce surface roughness of said surface, said laser beam having a wavelength above 3 μm that is absorbed by said silica layer; and d. deep reactive ion etching (DRIE), to obtain a rectangular section structure or group of such structures to define an active core of an optical waveguide, and doping said layer with rare-earth ions which serve as optical emitters.