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Proceedings Paper

Fabrication Of Low-Loss Waveguides In BK-7 By Ion Exchange
Author(s): R. G . Eguchi; E. A. Maunders; I. K. Naik
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Paper Abstract

Low-loss planar and channel waveguides were fabricated in BK-7 substrates by ion exchange using dilute AgNO3/NaNO3 melts. waveguide refractive index profiles were inferred by comparison with effective refractive index measurements made on the guided modes. The diffusion constant of silver and its activation energy in BK-7 were calculated from the measured refractive index data. It was found that a post-exchange annealing of the waveguides resulted in a significant decrease in the waveguide losses. A Fabry-Perot waveguide resonator loss measurement technique was developed to measure the attenuation in these waveguides because of the unreliability of prism coupling methods at low-loss levels. Losses as low as 0.068 dB/cm were measured in channel waveguides.

Paper Details

Date Published: 30 November 1983
PDF: 6 pages
Proc. SPIE 0408, Integrated Optics III, (30 November 1983); doi: 10.1117/12.935701
Show Author Affiliations
R. G . Eguchi, Northrop Research and Technology Center (United States)
E. A. Maunders, Northrop Research and Technology Center (United States)
I. K. Naik, Northrop Research and Technology Center (United States)

Published in SPIE Proceedings Vol. 0408:
Integrated Optics III
Dennis G. Hall; Lynn D. Hutcheson, Editor(s)

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