Variable optical attenuator with tunable wavelength selectivity

Details Variable optical attenuator with tunable wavelength selectivity Variable optical attenuator with tunable wavelength selectivity

2005-09-20

2005-09-20

Font, Frank G. (Department: 2883)

Optical waveguides

Accessories

Attenuator

C385S018000

Reexamination Certificate

active

06947656

ABSTRACT:
A variable optical attenuator with tunable wavelength selectivity includes at least two reflectors disposed parallel to each other at a predetermined angle from an optic axis and driving units connected to said at least two reflectors for allowing the reflectors to move back and forth in a direction perpendicular or parallel to the optic axis or to revolve centering on an axis perpendicular or parallel to the optic axis. Since the variable optical attenuator of the present invention serves as a variable optical attenuator and, at the same time, as a tunable wavelength filter, problems of insertion loss and optical alignment that might be caused by separately installing a variable optical attenuator and a wavelength filter can be effectively prevented. Moreover, by implementing the variable optical attenuator and the tunable wavelength filter by using a single device, the size of a system using the optical attenuator can be reduced.

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K. Aratani; “Process and Design Considerations for Surface Micromachined Beams for a Tuneable Interferometer Array in Silicon”; 1993 IEEE; pp. 230-235.
C. R. Giles, et al.; “A Silicon MEMS Optical Switch Attenuator and its Use in Lightwave Subsytems”; IEEE Journal of Selected Topics in Quantum Electronics, vol. 5, No. 1; Jan./Feb. 1999; pp. 18-25.

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