Attenuator device, and optical switching device

摘要

There is provided an attenuator device having a simple configuration and capable of selecting an output of beam of an arbitrary wavelength range from a plurality of output ports. The attenuator device comprises: a plurality of output fibers ( 1 - 3 and 1 - 5 ) having an end surface serving as an output port; discarding optical fibers ( 1 - 2 and 1 - 4 ) having an end surface serving as a discarding port and each arranged adjacently to the output optical fiber; a diffraction grating ( 5 ) which diffracts an incident beam into various directions according to the wavelength thereof; and a micro mirror array ( 7 ) which adjusts the output direction of the diffracted beam for each of the wavelength ranges output from the diffraction grating ( 5 ). The micro mirror array ( 7 ) adjusts the output direction of the diffracted beam so that a part of the diffracted beam may be output to the output port while the rest being output to the discarding port.