Optical waveguides – Directional optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2007-10-09
2007-10-09
Font, Frank G. (Department: 2883)
Optical waveguides
Directional optical modulation within an optical waveguide
Electro-optic
C385S011000, C385S050000
Reexamination Certificate
active
11505817
ABSTRACT:
The invention provides an optical modulator wherein appearance of radiation mode light can be suppressed to improve performances as a device. The optical modulator includes a multiplexing waveguide which in turn includes two input waveguides to which propagation lights from a linear waveguide are inputted, a waveguide coupling element, and two output waveguides. The width of the waveguide coupling element on the input side is greater than the total width of the two input waveguides, and the width of the waveguide coupling element on the output side is greater than the total width of the two output waveguides. The device of the present invention is applied typically to an optical communication system.
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Doi Masaharu
Ishizaka Tetsuo
Miyawaki Shuuichi
Fujitsu Limited
Staas & Halsey , LLP
Wong Eric
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