Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-08-02
2009-02-24
Kim, Ellen (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S046000
Reexamination Certificate
active
07496256
ABSTRACT:
A diffraction grating of the present invention includes a first block (101) and a second block (102). The first block (101) is made up of a plurality of input waveguides (103), a slab waveguide (104), a delay waveguide array (105) and narrow grooves (106): each of which being filled with resin. The second block (102) is made up of a plurality of input waveguides (107), a slab waveguide (108) and a plurality of output waveguides (109). Since a circuit is cut off at the ends of the arrayed waveguides, a relative phase can easily be measured. The resin has undergone a refractive-index adjustment and compensates a phase error.
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Ishikawa Hiroshi
Tsuda Hiroyuki
Uetsuka Hisato
Edwards Angell Palmer & & Dodge LLP
Hitachi Cable Ltd.
KEIO University
Kim Ellen
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