Swept frequency laser for FD OCT with intracavity element and method of operation
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United States of America Patent
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May 10, 2016
Grant Date -
Feb 2, 2012
app pub date -
Oct 12, 2011
filing date -
Aug 27, 2007
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Abstract
A frequency swept laser source that generates an optical signal that is tuned over a spectral scan band at single discrete wavelengths associated with longitudinal modes of the swept laser source. Laser hopping over discrete single cavity modes allows long laser coherence length even under dynamic very high speed tuning conditions. A ramp drive to the laser is used to linearize laser frequency tuning. A beam splitter is used to divide the optical signal between a reference arm leading to a reference reflector and a sample arm leading to a sample. A detector system detects the optical signal from the reference arm and the sample arm for generating depth profiles and images of the sample.
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