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Use of broadband, continuous-wave diode lasers in cavity ring-down spectroscopy for liquid samples
A J Hallock1, E S F Berman, R N Zare
1Department of Chemistry, Stanford University, Stanford, California 94305-5080, USA.
Applied Spectroscopy
|December 9, 2003
Summary
Cavity ring-down spectroscopy (CRDS) now analyzes liquids with broad absorption features, not just gases. This sensitive technique uses inexpensive diode lasers, making it accessible and straightforward for liquid analysis.
Area of Science:
- Analytical Chemistry
- Spectroscopy
Background:
- Cavity ring-down spectroscopy (CRDS) is a highly sensitive absorption technique.
- Traditionally, CRDS is applied to gas samples with narrow absorption features.
Purpose of the Study:
- To demonstrate the application of CRDS to liquid samples.
- To explore the use of inexpensive diode lasers for liquid CRDS.
Main Methods:
- Adaptation of Cavity ring-down spectroscopy (CRDS) for liquid samples.
- Utilizing small, inexpensive diode lasers as light sources.
Main Results:
- CRDS successfully applied to liquid samples with broad absorption features.
- Demonstrated feasibility of using low-cost diode lasers for liquid CRDS.
Conclusions:
- CRDS is a viable and sensitive technique for analyzing liquid samples.
- The use of diode lasers makes CRDS accessible and straightforward for liquid analysis, offering wide appeal.