Optical device

Details Optical device Optical device

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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Nabeel A. Riza et al. Multi-Wavelength 2×2 Fiber-Optic Switch Structure using Mirror Array. Conf Proc Int LEOS Annu Meet (IEEE Lasers Electro Opt Soc, 1999, vol. 12thNo. vol. 1 pp. 129-130.
Hirofumi Shimomura et al. Wavelength-division add/drop multiplexer using a single wavelength-filter and back-reflector switches. Opt Fiber Commun Conf. 1998, vol. 1998, pp. 80-82.
Senichi Suzuki. Photonic Devices Based on Arrayed-Waveguide Gratings. Nippon Telegraph and Telephone Corporation. vol. 82 No. 7 pp. 746-752, 1999.

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