Optical waveguide coupler for monitoring

Details Optical waveguide coupler for monitoring Optical waveguide coupler for monitoring

1988-06-08

1990-02-27

Lee, John D.

350 9616, G02B 626

Patent

active

049040405

ABSTRACT:
An optical waveguide coupler comprises at least two optical waveguides such as optical fibers closely spaced apart for allowing light propagating in one optical waveguide to couple into the other. Optical waveguide portions of the waveguides are made of materials having different refractive indices respectively. The feature stabilizes the splitting ratio against a slight change in coupling length, whereby the control of the coupling ratio during manufacture becomes easy, and deviations in splitting ratio can be greatly reduced.

REFERENCES:
patent: 4490163 (1984-12-01), Jochem et al.
patent: 4515431 (1985-05-01), Shaw et al.
patent: 4546476 (1985-10-01), Shaw et al.
patent: 4553238 (1985-11-01), Shaw et al.
patent: 4630884 (1986-12-01), Jubinski
patent: 4632513 (1986-12-01), Stowe et al.
patent: 4673270 (1987-06-01), Gordon
patent: 4755037 (1988-07-01), Bjornlie et al.

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