Properties of optical waveguides formed by thermal migration of thallium ions in glass
- 15 December 1978
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 33 (12) , 997-999
- https://doi.org/10.1063/1.90267
Abstract
A simple process is presented for fabricating channel waveguides by a thallium‐ion diffusion technique. The thallium diffusion coefficient is estimated to be 2×10−12 cm2/sec at 400 °C. Effective mode index measurements show a complementary error function index profile in the waveguide. Waveguide losses are measured to be −0.60 dB/cm. A passive component of optical communications systems, a star coupler, is fabricated using the thallium‐ion exchange process.Keywords
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