Coherent light generators – Particular component circuitry – Controlling current or voltage to laser
Reexamination Certificate
2005-07-26
2005-07-26
Wong, Don (Department: 2821)
Coherent light generators
Particular component circuitry
Controlling current or voltage to laser
C372S029020, C372S029021, C372S031000, C372S032000, C372S034000, C372S038010, C372S038020
Reexamination Certificate
active
06922423
ABSTRACT:
A control system architecture that allows a semiconductor laser to be stabilized with respect to critical parameters, such as output power and/or emission wavelength, with a reduced cost with respect to the components required to implement control, while simultaneously maintaining or increasing precision of the control function. This is achieved using sophisticated integrated circuitry contained within the laser package to measure data related to multiple laser operation parameters and to transmit these parameters to a control circuit. In particular, precision thermal measurements may be used to eliminate the need for optical detectors in the laser package. The invention described herein has significant utility for different types of semiconductor lasers, including both edge emitting and VCSEL-type semiconductor lasers.
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Al-Nazer Leith A.
Carothers, Jr. W. Douglas
Wong Don
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