Optical waveguides – Integrated optical circuit
Patent
1996-09-04
1998-08-18
Ullah, Akm E.
Optical waveguides
Integrated optical circuit
372 50, G02B 612
Patent
active
057968837
ABSTRACT:
A semiconductor waveguide layer is provided in an optical semiconductor integrated circuit device comprising a passive region having at least a branch and an active region having at least a laser diode connected to the branch and at least a photo-diode connected to the branch. The active region is in contact with the passive region. The waveguide layer selectively extends over the passive region and the active region. The semiconductor waveguide layer in the active region has a wavelength composition larger than that in the passive region. The waveguide layer has a semiconductor crystal structure which is continuous not only over the active and passive regions but also at a boundary between the active and passive regions.
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Hamamoto Kiichi
Hayashi Masako
Komatsu Keiro
Mito Ikuo
Sasaki Tatsuya
NEC Corporation
Ullah Akm E.
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