Monolithic Folded Resonator for Evanescent Wave Cavity Ringdown Spectroscopy

Published

March 1, 2000

Author(s)

A C. Pipino

Abstract

An optical resonator is characterized that employs both ultra-high-reflective coated surfaces and total-internal reflection to enable cavity ring-down spectroscopy of surfaces, films, and liquids. The monolithic design possesses a polarization-independent finesse which allows polarization-dependent phenomena, such as molecular orientation, to be probed. Although a restricted bandwidth ({approximately equal to} 80 nm) results from the use of optical coatings, the resonator provides high-sensitivity, excellent stability, and facile operation for narrow bandwidth applications. A noise equivalent absorption of 6.4 x 10^-7 Hz^-1/2 was obtained using multimode excitation at 530 nm. Improvements in sensitivity of 10 to 10⁴ appear feasible, depending on the spectral region.

Citation

Applied Optics

Volume

39

Issue

No. 9

Pub Type

Journals

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Keywords

cavity ring-down, condensed matter, optical absorption, surfaces, thin films

Citation

Pipino, A. (2000), Monolithic Folded Resonator for Evanescent Wave Cavity Ringdown Spectroscopy, Applied Optics, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=830650 (Accessed May 9, 2026)

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