1. Cavity-enhanced optical frequency comb spectroscopy of high-temperature H_2O in a flame
- Author
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Amir Khodabakhsh, Aleksandra Foltynowicz, Chadi Abd Alrahman, Zhechao Qu, and Florian M. Schmidt
- Subjects
Materials science ,Absorption spectroscopy ,business.industry ,Laser ,Atomic and Molecular Physics, and Optics ,Fourier transform spectroscopy ,law.invention ,Finesse ,Optics ,law ,Optical cavity ,Fiber laser ,Femtosecond ,Spectroscopy ,business - Abstract
We demonstrate near-infrared cavity-enhanced optical frequency comb spectroscopy of water in a premixed methane/air flat flame. The detection system is based on an Er:fiber femtosecond laser, a high finesse optical cavity containing the flame, and a fast-scanning Fourier transform spectrometer (FTS). High absorption sensitivity is obtained by the combination of a high-bandwidth two-point comb-cavity lock and auto-balanced detection in the FTS. The system allows recording high-temperature water absorption spectra with a resolution of 1 GHz and a bandwidth of 50 nm in an acquisition time of 0.4 s, with absorption sensitivity of 4.2 × 10(-9) cm(-1) Hz(-1/2) per spectral element.
- Published
- 2014
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