Variable optical attenuator

Details Variable optical attenuator Variable optical attenuator

2006-06-20

2006-06-20

Font, Frank G. (Department: 2883)

Optical waveguides

Accessories

Attenuator

C385S039000

Reexamination Certificate

active

07065284

ABSTRACT:
The invention provides a variable optical attenuator capable of adjusting the attenuation of an optical signal to obtain the optical signal having a controlled intensity. The variable optical attenuator includes a circular loop formed by winding an optical fiber by at least one turn. The circular loop of the optical fiber is mechanically transformed into an oval loop to change the curvature radius at the deflected part of the optical fiber so that the attenuation of the output light is adjusted.

REFERENCES:
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patent: 5461686 (1995-10-01), Weinberger et al.
patent: 2002/0146231 (2002-10-01), Johnson et al.
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patent: 2002-107639 (2002-04-01), None
patent: WO 00/16143 (2000-03-01), None
B. Scholl, et al; In-line fiber optical attenuator and powermeter; SPIE vol. 1792 Components for Fiber Optic Applications VII (1992); XP 000199007; pp. 65-70; Sep. 10, 1992.

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