Optical waveguide attenuation

Details Optical waveguide attenuation Optical waveguide attenuation

1998-07-15

2000-02-01

Ullah, Akm E.

Optical waveguides

Miscellaneous

G02B 600

Patent

active

060212489

ABSTRACT:
A turntable optical transmission circuit has a light source forming an input to a waveguide, a detector detecting light output from the waveguide, a comparator for comparing the output with a predetermined value to generate a difference signal and a waveguide trimmer for changing the waveguide transmission in dependence on the difference signal until the output matches the predetermined value.

REFERENCES:
patent: 3774987 (1973-11-01), Boivin
patent: 4848219 (1989-07-01), Seino et al.
patent: 4891614 (1990-01-01), De Ronde
patent: 5111111 (1992-05-01), Stevens et al.
patent: 5321714 (1994-06-01), Paoli

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