Accession Number : ADD017537

Title :   Bi-Refringent Waveguide Rotational Alignment Method using White Light Interferometry.

Descriptive Note : Patent, Filed 21 Mar 94, patented 6 Jun 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bramson, Michael D

Report Date : 06 Jun 1995

Pagination or Media Count : 11

Abstract : A method for rotationally aligning two bi-refringent waveguides, a single bi-refringent waveguide and a polarizing fiber or Ti-indifused fiber, and a bi-refringent waveguide and a proton exchange integrated optical chip. The method employs a scanning Michelson interferometer, an ELED light source and an appropriate arrangement of an input polarizer, and output analyzer, necessary coupling lens and a display means for visually observing coherence characteristics of the waveguides during alignment. An Advantest analyzer which contains a scanning Michelson interferometer and display means is used in a preferred embodiment optical arrangement. A set of mathematic relationships applicable to the alignments addressed by the invention is provided. Alignment accuracy as low as delta approx. =0.18 deg is possible.

Descriptors :   *FIBER OPTICS, *BIREFRINGENCE, *PATENTS, COUPLING(INTERACTION), INPUT, POLARIZATION, COHERENCE, ACCURACY, OPTICAL WAVEGUIDES, LIGHT SOURCES, OPTICAL SCANNING, LENSES, SPECTRUM ANALYZERS, MICHELSON INTERFEROMETERS, POLARIZERS

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE