Optical waveguides – Integrated optical circuit
Reexamination Certificate
2009-02-26
2011-11-29
Pak, Sung (Department: 2874)
Optical waveguides
Integrated optical circuit
C385S043000
Reexamination Certificate
active
08068704
ABSTRACT:
An optical waveguide circuit includes: a lower cladding layer formed on a substrate; a first optical waveguide formed on the lower cladding layer so as to partition the lower cladding layer into a first portion and a second portion; a second optical waveguide formed on the first portion, the second optical waveguide including a tip end portion directed toward a side face of the first optical waveguide, the tip end portion being narrowed in a tapered manner; and a third optical waveguide formed on the second portion, the third optical waveguide including a tip end portion directed toward the tip end portion of the second optical waveguide, a tip end portion of the third optical waveguide being narrowed in a tapered manner.
REFERENCES:
patent: 7236668 (2007-06-01), Hanashima et al.
Toshihiko Baba, et al., “Si Photonic Wire Waveguides”, Journal of the Institute of Electronics, Information and Communication Engineers, vol. J88-C, No. 6, 2005, pp. 363-373.
Wim Bogaerts, et al., “Low-loss, low-cross-talk crossings for silicon-on-insulator nanophotonic waveguides”, Optical Letters, vol. 32, No. 19, Oct. 1, 2007, pp. 2801-2803.
Ezaki Mizunori
Hashimoto Rei
Yoshida Haruhiko
Kabushiki Kaisha Toshiba
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Pak Sung
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