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Integrated optics reflectometer

United States Patent

9,557,243
January 31, 2017
View the Complete Patent at the US Patent & Trademark Office
An apparatus includes a laser source configured to output laser light at a target frequency, and a measurement unit configured to measure a deviation between an actual frequency outputted by the laser source at a current period of time and the target frequency of the laser source. The apparatus includes a feedback control unit configured to, based on the measured deviation between the actual and target frequencies, control the laser source to maintain a constant frequency of laser output from the laser source so that the frequency of laser light transmitted from the laser source is adjusted to the target frequency. The feedback control unit can control the laser source to maintain a linear rate of change in the frequency of its laser light output, and compensate for characteristics of the measurement unit utilized for frequency measurement. A method is provided for performing the feedback control of the laser source.
Couch; Philip R (Cotleigh Honiton, GB), Murphy; Kent A. (Troutville, VA), Gunther; Michael F (Blacksburg, VA), Gause; Charles B (Providence, NC)
AXONOPTICS LLC (Harrisonburg, VA)
14/ 944,315
November 18, 2015
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT At least part of the present disclosure was conceived or first actually reduced to practice under a contract with the U.S. Department of Energy.