Method of cleaving a crystal to produce a high optical quality c

Details Method of cleaving a crystal to produce a high optical quality c Method of cleaving a crystal to produce a high optical quality c

1982-05-24

1984-09-04

Hearn, Brian E.

Glass manufacturing

Processes

Glass preform treating

65 2, 83880, 83881, 83 32, 225 2, 225 965, 350 961, 350 9612, H01L 3118

Patent

active

044695004

ABSTRACT:
A high optical quality corner is produced on a cleaved crystal which may include a stripe or surface optical waveguide by making a fracture initiation mark along only a portion of the surface intercept of the desired cleavage plane with a first of two major surfaces of the crystal and then tensioning the first major surface of the crystal to fracture the crystal along the desired cleavage plane beginning at the fracture initiation mark. This produces a high optical quality corner along a portion of the intersection of the newly cleaved surface with the major surface of the crystal. This high optical quality corner is located where no fracture initiation mark was made and enables the crystal to be used in as-cleaved form for end-fire coupling between its waveguide and an external waveguide such as an optical fiber.

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