Fiber laser intracavity absorption spectroscopy of ammonia and hydrogen cyanide in low pressure hydrocarbon flames

A. Goldman, I. Rahinov, S. Cheskis*, B. Löhden, S. Wexler, K. Sengstock, V. M. Baev

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Fiber laser intracavity spectroscopy (FLICAS) with Er-doped fiber laser has been applied for the first in situ detection of ammonia and hydrogen cyanide in a low pressure (30 Torr) stoichiometric methane/nitrogen/oxygen flame doped with 0.13-1.36% of NH3. High resolution spectra of NH3 and HCN have been recorded in the range of 1.5 μm (6440-6540 cm-1). The minimum detectable concentration of HCN and NH3 at a laser pulse duration of 8 μs and room temperature is 1 × 1013 molecule/cm3. The method can be used for in situ detection of many other molecules in the hostile combustion environment.

Original languageEnglish
Pages (from-to)147-151
Number of pages5
JournalChemical Physics Letters
Volume423
Issue number1-3
DOIs
StatePublished - 20 May 2006

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