Photoelastic effect optical waveguides

Details Photoelastic effect optical waveguides Photoelastic effect optical waveguides

1983-08-22

1985-12-31

Sikes, William L.

350 9612, 350355, 29569R, G02B 610

Patent

active

045617180

ABSTRACT:
An optical waveguide apparatus provides for single-mode and multimode switching or modulation of light wave energy with reduced bias voltages. Optical channels are formed in a crystal substrate by depositing film stripes thereon to cause stress-induced changes in the relative refractive index. Coupling or switching of light waves between the channels is provided by applying a bias which is of reversed polarity at adjacent film stripes, thereby augmenting or diminishing the stress in individual channels. By allowing operation with close spacing of the electrodes and using the enhancement in refractive index change of the stressed substrate in combination with the applied bias, the required control voltage is substantially reduced.

REFERENCES:
patent: 3695747 (1972-10-01), Maldonado
patent: 4005927 (1977-02-01), Caton
patent: 4166669 (1979-09-01), Leonberger et al.
patent: 4175827 (1979-11-01), McMahon
patent: 4179184 (1979-12-01), Nelson

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