Coherent light generators – Particular active media – Semiconductor
Reexamination Certificate
2007-06-12
2007-06-12
Harvey, Minsun Oh (Department: 2828)
Coherent light generators
Particular active media
Semiconductor
C372S050100, C356S478000
Reexamination Certificate
active
11108039
ABSTRACT:
A monolithic wavelength stabilized system comprises a laser monolithically formed with a waveguide splitter having at least two branches. Non-identical resonators having different wavelengths are operatively coupled to each branch of the splitter and a photodiode is communicatively coupled to receive the output from each non-identical resonator. A control unit receives the photocurrent outputs from the photodiodes, determines based on the photocurrents whether the wavelength of the laser signal is at a desired value, and transmits a feedback signal to the laser to move the laser output toward the desired wavelength. The laser, splitter, resonators, and photodiodes are monolithically formed in a single chip using asymmetric waveguides.
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Datta Shubhashish R.
Forrest Stephen R.
Menon Vinod M.
Harvey Minsun Oh
Nguyen Tuan N.
The Trustees of Princeton University
Woodcock & Washburn LLP
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