Coherent light generators – Particular component circuitry – For driving or controlling laser
Reexamination Certificate
2006-04-04
2006-04-04
Harvey, Minsun (Department: 2828)
Coherent light generators
Particular component circuitry
For driving or controlling laser
C372S050100
Reexamination Certificate
active
07023889
ABSTRACT:
A laser module has two semiconductor laser devices and a laser driving circuit. These laser devices are placed adjacent to each other. The laser driving circuit has normal and reverse phase data output terminals. One semiconductor laser device is connected to the normal phase data output terminal, and the other semiconductor laser device is connected to the reverse phase data output terminal. When a series of identical bits is output, the temperature changes of the two laser devices are complementary. Accordingly, the temperature variation of each laser device is moderated. Thus, the variation in the amount of chirp can be reduced.
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Harvey Minsun
McDermott Will & Emery LLP
Nguyen Tuan N.
Sumitomo Electric Industries Ltd.
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