Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takenori Ichigi0
Masataka Yamashita0
Masatsugu Oshima0
Osamu Mitomi0
Jun Okumura0
Date of Patent
February 27, 2007
0Patent Application Number
099480070
Date Filed
September 6, 2001
0Patent Primary Examiner
Patent abstract
An optical device includes an optical input waveguide, a branch/cross waveguide, an optical output waveguide and connection waveguides that connect the optical input and optical output waveguides to the cross/branch waveguide. The spot size of light propagating through the cross/branch waveguide is larger than the spot size of light propagating through optical input waveguides, the optical output waveguides, or the connection waveguides.
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