Optical waveguides – Planar optical waveguide
Reexamination Certificate
2007-09-04
2007-09-04
Bovernick, Rodney (Department: 2874)
Optical waveguides
Planar optical waveguide
C385S130000, C385S039000, C385S027000, C385S024000
Reexamination Certificate
active
10534835
ABSTRACT:
In a multi-mode interference waveguide (MMI) of a sheet shape spreading in the length direction and the width direction, the length of the multi-mode interference waveguide is set to such a length that the unique mode interferes in the length direction, thereby reducing the coupling loss when inputting/outputting the signal light. The multi-mode interference waveguide has a maximum refraction factor portion in the thickness direction and has such a refraction factor distribution that the refraction factor is reduced as departing from the maximum refraction factor portion. Thus, it is possible to suppress mode dispersion in the thickness direction of the multi-mode interference waveguide and obtain a high transmission rate in the order of 10 Gb/s.
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Bovernick Rodney
Rojas Omar
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