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Abstract
Two intracavity laser absorption techniques for ultralow concentration detection of chemicals in solution are compared. The first consists of a laser diode in a grating extended cavity, which produces a linear calibration curve for parts in 109 (ppb) concentrations corresponding to 17 nM. By replacing the grating with a highly reflective mirror, parts in 1012 (ppt) concentration detection is achieved, which corresponds to 340 pM. We report, to our knowledge for the first time, ppt detection of analyte concentration in liquid solution demonstrating good agreement between theory and experiment.
| Original language | English |
|---|---|
| Pages (from-to) | 3995-3999 |
| Number of pages | 5 |
| Journal | Applied Optics |
| Volume | 46 |
| Issue number | 19 |
| DOIs | |
| Publication status | Published - 2007 |
Keywords
- spectroscopy
- diode lasers
- absorption
- photonics
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Dive into the research topics of 'Real time, ultra low concentration detection of analytes in solution by infrared intracavity laser absorption'. Together they form a unique fingerprint.Projects
- 1 Finished
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Physical and chemical property characterisation in HTT by in-situ analysis and smart data processing
Littlejohn, D. (Principal Investigator), Burns, D. (Co-investigator), Gachagan, A. (Co-investigator), Girkin, J. (Co-investigator) & Hayward, G. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
1/10/04 → 29/02/08
Project: Research