Fabrication and phase tuning of an optical waveguide device

Details Fabrication and phase tuning of an optical waveguide device Fabrication and phase tuning of an optical waveguide device

1991-09-27

1993-03-16

Ullah, Akm E.

Optical waveguides

Planar optical waveguide

Thin film optical waveguide

156626, 156628, 156643, 372109, G02B 600, H01S 300, H01L 21306, B44C 122

Patent

active

051951630

ABSTRACT:
The manufacture of an optical waveguide device utilizing a fast, accurate method for tuning of the output phase angle of such devices to a desired operating point. Tuning is accomplished by adjusting the accumulated phase along a waveguide arm of the device by removing optical waveguide material using laser ablation. Due to the change in waveguide geometry in the ablated region, the optical phase velocity is changed and thus the optical path length is affected in that section of waveguide, thereby resulting in a change in output phase angle.

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