Optical waveguides – With optical coupler – Switch
Reexamination Certificate
2007-07-03
2007-07-03
Font, Frank G. (Department: 2883)
Optical waveguides
With optical coupler
Switch
C385S017000, C385S018000, C385S020000, C385S021000, C385S024000, C385S031000, C385S037000, C385S039000, C385S047000, C385S050000
Reexamination Certificate
active
11140366
ABSTRACT:
An optical device enabling reducing device scale is constituted by M circulators (11a,11b), (M being a natural number), a waveguide-type diffraction grating (12) including M first input/output waveguides (121a,121b) formed at its one end and M×N second input/output waveguides (125a-1to125a-N and125b-1to125b-N) formed at the other end, (N being a natural number), and paths from the M circulators being connected to the M first input/output waveguides; and N reflection-type optical switches (13-1to13-N) each for reflecting the optical paths for M adjacent waveguides out of the M×N second input/output waveguides (125a-1to125a-N and125b-1to125b-N) and for switching over the returning-destination waveguide respectively, wherein the M circulators, the waveguide-type diffraction grating and N reflection-type optical switches are arranged in cascade. Consequently, the optical device can function preferably also as a wavelength selective optical switch available in a WDM transmission system.
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Naruse Terukazu
Shibata Kohei
Tabuchi Haruhiko
Terada Koji
Font Frank G.
Fujitsu Limited
Katten Muchin & Rosenman LLP
Lepisto Ryan
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