Fixed value fiber optic attenuator with index matching material

Details Fixed value fiber optic attenuator with index matching material Fixed value fiber optic attenuator with index matching material

1995-04-28

1996-12-03

Lee, John D.

Optical waveguides

Accessories

Attenuator

385 27, 385 32, G02B 626

Patent

active

055816495

ABSTRACT:
A fiber optic attenuator having a predetermined, fixed attenuation value and low back reflection properties across a broad wavelength spectrum is disclosed. Attenuation is achieved by providing an optical fiber pathway having an attenuation region which causes a predetermined signal loss. The medium defining the pathway is of a substantially constant index of refraction through the device to minimize or eliminate interference caused by Fresnel reflections. An index matching material surrounds the area of attenuation to eliminate or minimize modal or cladding noise.

REFERENCES:
patent: 4257671 (1981-03-01), Barbaudy et al.
patent: 5109468 (1992-04-01), Tamulevich et al.
patent: 5243681 (1993-09-01), Bowen et al.

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