Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2008-04-01
2008-04-01
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Switch
C385S016000, C385S017000, C385S019000, C385S033000, C385S047000, C385S027000, C385S024000, C359S291000, C359S197100
Reexamination Certificate
active
11104143
ABSTRACT:
Effects of diffraction of a spectral beam from an edge of the micromirrors are reduced in order to optimize the passband in a wavelength selective switch. The effects of diffraction on the pass band may be reduced by appropriate modification of the edges of the micromirrors, by modification of the input and/or output ports to allow for attenuation by rotation of the micromirror about the switching axis, by using rotation of the micromirror about both the attenuation axis and the switching axis to achieve the desired level of attenuation, by inserting an aperture at a focal plane or external to the device to reduce the magnitude of the micromirror edge diffraction transmitted to any or all output ports, or by appropriate filtering of angular frequencies with a diffraction grating used to separate a multi-channel optical signal into constituent spectral beams.
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Davis Joseph E.
Garrett Mark H.
Anderson Guy G
Capella Photonics
Font Frank G.
Isenberg Joshua D.
JDI Patent
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