Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
January 25, 2011
Patent Application Number
12099205
Date Filed
April 8, 2008
Patent Primary Examiner
Patent abstract
A semiconductor laser (a first semiconductor optical device) and an optical modulator (a second semiconductor optical device) are integrated on the same n-type InP substrate. The semiconductor laser butt-joined to the optical modulator. Each of the semiconductor laser and the optical modulator has a Be-doped p-type InGaAs contact layer. The p-type InGaAs contact layers have a Be-doping concentration of 7×1018 cm−3 or more, and a thickness of 300 nm or less.
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