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US 5,576,879 AGranted
Composite optical modulator
AssigneeFuji Xerox Co., Ltd.
InventorKeiichi Nashimoto
Life of this patent
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Abstract
A composite optical modulator comprising a semiconductor laser having thereon an interposed buffer layer and an optical modulating device in this order, the optical modulating device comprising a thin ferroelectric lightguide film which is epitaxial or oriented with respect to a substrate of the semiconductor laser, the optical modulating device modulating a laser light launched from the semiconductor laser and thereafter emitting a modulated laser light.
Claims12
A composite optical modulator comprising:
- a semiconductor substrate;
- a semiconductor laser device having an active layer formed on a first region of said semiconductor substrate;
- an epitaxial or oriented ferroelectric layer formed on a second region of said semiconductor substrate;
- and
- a buffer layer provided at an interface between said semiconductor substrate and said ferroelectric layer for controlling the epitaxial growth or orientation of said ferroelectric layer,
- a laser beam emitted from said active layer being coupled to said ferroelectric layer.
3 more elements
A composite optical modulator comprising:
- a semiconductor substrate;
- a semiconductor laser device having an active layer formed on said semiconductor substrate;
- an epitaxial or oriented ferroelectric layer formed on said semiconductor laser device;
- and
- a buffer layer provided at an interface between said semiconductor laser device and said ferroelectric layer for controlling epitaxial growth or orientation of said ferroelectric layer,
- a laser beam emitted from said active layer being coupled to said ferroelectric layer.
3 more elements
Dependencies are inferred from the claim text.