A. A. Zaytsev, I. V. Nikolaev, V. N. Ochkin, S. N. Tskhai, “External-cavity diode laser spectrometer for measuring the concentration ratio 13CO2/12CO2 by absorption in the range of 1.6 μm”, Kvantovaya Elektronika, 2015, Volume 45, Number 7,Pages 680

This article is cited in 3 papers

Laser applications and other topics in quantum electronics

External-cavity diode laser spectrometer for measuring the concentration ratio ¹³CO₂/¹²CO₂ by absorption in the range of 1.6 μm

A. A. Zaytsev^ab, I. V. Nikolaev^a, V. N. Ochkin^a, S. N. Tskhai^a

^a P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^b Moscow Institute of Physics and Technology (State University), Dolgoprudny, Moscow region

Abstract: The method for determining the carbon isotopic ratio from CO₂ absorption spectra in the optical cavity containing atmospheric air with the natural contents of carbon dioxide ≈0.03% is described. The measurements are performed at atmospheric pressure in the conditions of overlapping absorption lines. The measurement accuracy is 0.3‰.

Keywords: ratio of isotope concentrations, diode laser, cavity, absorption spectroscopy.

PACS: 42.62.Fi, 42.55.Px, 42.60.Da

Received: 20.03.2015
Revised: 25.05.2015