Multiple path configuration for a laser interferometer

Details Multiple path configuration for a laser interferometer Multiple path configuration for a laser interferometer

1976-07-12

1978-10-17

Corbin, John K.

Optics: measuring and testing

Refraction testing

Prism engaging specimen

350 9611, G01B 902

Patent

active

041205880

ABSTRACT:
By appropriately arranging and configuring dielectric waveguides formed within a substrate, a path configuration suitable for use in laser interferometer may be fabricated in a small overall area without sacrificing overall sensitivity. The path configuration includes a disposition of overlapping waveguide loops in a first and second plane. Intersection of the crossing waveguide segments is avoided by appropriate disposition of the respective segments in the two separated planes. Transition between the two planes may be made by means of a twisted waveguide bend or a transitional coupler. In one embodiment each waveguide loop may have a generally rectangular shape. The parallel sides of each loop are offset from the adjacent loops by a predetermined distance such that the horizontal dimension of the loops decreases while the vertical dimension increases between the first and last loop of the configuration.

REFERENCES:
patent: 3102953 (1963-09-01), Wallace
patent: 4013365 (1977-03-01), Vali et al.

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