VARIABLE OPTICAL ATTENUATOR AND OPTICAL TRANSMITTER-RECEIVER EQUIPPED WITH VARIABLE OPTICAL ATTENUATOR

摘要

PROBLEM TO BE SOLVED: To provide a variable optical attenuator in which a high speed operation, non-dependency on wavelength, compactness and an easy mounting are available.

SOLUTION: The variable optical attenuator attenuates the intensity of output light with respect to the intensity of input light by means of a parallel plate 6 with a variable angle mechanism composed of: a variable angle MEMS 109 which passes light and varies the angle of an incident face; and high reflection filters 7 and 8 which are provided on the incident face and the emitting face of the variable angle MEMS 109 and expand the shift of optical paths between the light which is made incident to the incident face and the light which is emitted from the emitting face.

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