J. B. Paul

cw Integrated cavity output spectroscopy

Abstract A new approach is described in which continuous, narrow band laser sources are employed with the recently developed integrated cavity output spectroscopy technique to obtain sensitive, quantitative absorption spectra in a simple experimental configuration. Absorption data obtained with cw-ICOS are related to the classical Fabry–Perot intracavity absorption model, which describes why the intracavity absorption is enhanced. A method of continuously injecting cw laser light into the cavity is described, as is a simple means of interpreting the ICOS data to extract accurate absorption intensities. Absorption spectra of vibrational combination bands of CO 2 and H 2 O in the 1.3 μm region are presented.

UV Fiber-Laser-Based Fluorescence and Blue Diode-Laser-Based Phosphorescence-Lifetime Methods

Combination of a novel, tunable pulsed UV-fiber laser with a fluorescence-detection design using carbon nanofiber coatings and blue diode lasers with a novel lifetime-phosphorescence method has provided new turn-key instrumentation for monitoring applications.

Cavity Enhanced Spectroscopy with Novel Near- and Mid-Infrared Laser Sources

Recent advances in cavity enhanced spectroscopy are presented, including results obtained with a rapidly scanned fiber laser at 1 micron, results at 2.23 microns using diode lasers, and results at 3.3 microns using difference-frequency generation.

CW integrated cavity output spectroscopy

An approach is described that enables continuous, narrow band laser sources to be used in conjunction with the recently developed integrated cavity output spectroscopy (ICOS) technique to obtain sensitive, quantitative absorption spectra.