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Coupled-cavity ring-down spectroscopy technique |
Optics Letters, Vol. 37, Issue 16, pp. 3354-3356 (2012)
http://dx.doi.org/10.1364/OL.37.003354
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Abstract
We present a technique called coupled-cavity ring-down spectroscopy (CC-RDS) for controlling the finesse of an optical resonator. Applications include extending the sensitivity and dynamic range of a cavity-enhanced spectrometer as well as widening the useful spectral region of high-reflectivity mirrors. CC-RDS uses controlled feedback of the probe laser beam to a ring-down cavity, which leads to interference between the internally circulating light and that which is fed back through a cavity mirror port. Using a 74 cm long ring-down cavity and a feedback cavity with a finesse of 16, we demonstrate that this effect increases the decay time constant from 210 μs to 280 μs, corresponding to an increase of finesse from
© 2012 Optical Society of America
OCIS Codes
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(140.4780) Lasers and laser optics : Optical resonators
(300.1030) Spectroscopy : Absorption
ToC Category:
Spectroscopy
History
Original Manuscript: May 14, 2012
Manuscript Accepted: June 6, 2012
Published: August 6, 2012
Citation
Jérémie Courtois and Joseph T. Hodges, "Coupled-cavity ring-down spectroscopy technique," Opt. Lett. 37, 3354-3356 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-16-3354
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