Wavelength independent variable optical attenuator

Details Wavelength independent variable optical attenuator Wavelength independent variable optical attenuator

1999-06-29

2000-11-21

Schuberg, Darren

Optical: systems and elements

Mirror

Plural mirrors or reflecting surfaces

359201, 359857, 385140, G02B 508

Patent

active

061492787

ABSTRACT:
The invention provides an optical attenuator having a pair of substantially parallel mirrors that attenuate an optical signal based, at least in part, on the rotation angle of the mirrors. When the pair or mirrors is in a predetermined position, an input optical signal is directed from an input port to an output port with a minimum insertion loss. As the pair of mirrors is rotated, the optical signal is shifted parallelly, which provides increased insertion loss and an attenuated signal at the output port. The pair of mirrors can be rotated, for example, with a stepper motor, or other device.

REFERENCES:
patent: 4192573 (1980-03-01), Brown, Jr.
patent: 4516827 (1985-05-01), Lance et al.
patent: 4591231 (1986-05-01), Kaiser et al.
patent: 4989938 (1991-02-01), Tamulevich
patent: 5087122 (1992-02-01), Ostrander et al.
patent: 5325459 (1994-06-01), Schmidt
patent: 5677977 (1997-10-01), Smith
patent: 5745634 (1998-04-01), Garrett et al.

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