Tunable spectroscopic source with power stability and method of operation
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United States of America Patent
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Issued Date -
Dec 29, 2005
app pub date -
Aug 18, 2005
filing date -
Dec 9, 2002
priority date (Note) -
Abandoned
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Abstract
A laser system for a spectroscopic catheter system utilizes an overmoded cavity in order to reduce mode hoping induced power fluctuations during wavelength scanning. In the preferred embodiment, a semiconductor gain medium is used to reduce cost. A fiber pigtail is used to define the laser cavity, which has a tight cavity mode spacing of less that 15 Gigahertz. A diffraction grating is used as the tuning element. A cylindrical lens is used to reduce alignment tolerances and thereby increase manufacturability.
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