Tunable optical filter

Details Tunable optical filter Tunable optical filter

G - Physics

02

B

G02B 6/293 (2006.01) G02B 5/20 (2006.01) H04J 14/02 (2006.01)

Patent

CA 2556105

A tunable optical filter includes a demultiplexing device, such as an arrayed waveguide grating (AWG) or echelle grating, for separating a multiplexed optical signal into a plurality of demultiplexed optical signals. An imaging lens converges the plurality of demultiplexed optical signals to a common point on a tiltable reflector, which for example is a microelectromechanical system (MEMS) mirror. The tiltable reflector is rotated about a first axis to select which one of the demultiplexed optical signals in the plurality the tunable optical filter is tuned to. More specifically, the tiltable reflector is rotated about the first axis to select which one of the demultiplexed optical signals will be reflected with an angle that allows it to repass through the demultiplexing device and be output from an output port of the tunable optical filter.

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