Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2011-08-23
2011-08-23
Park, Kinam (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S043010, C372S044010, C372S045010, C372S030000
Reexamination Certificate
active
08005124
ABSTRACT:
A method for producing wide bandwidth laser emission responsive to high frequency electrical input signals, including the following steps: providing a heterojunction bipolar transistor device having collector, base, and emitter regions; providing at least one quantum size region in the base region, and enclosing at least a portion of the base region in an optical resonant cavity; coupling electrical signals, including the high frequency electrical input signals, with respect to the collector, base and emitter region, to cause laser emission from the transistor device; and reducing the operating beta of the transistor laser device to enhance the optical bandwidth of the laser emission in response to the high frequency electrical signals.
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Feng Milton
Holonyak, Jr. Nick
Then Han Wui
Walter Gabriel
Novack Martin
Park Kinam
The Board of Trustees of the University of Illinois
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