Towards absorption spectroscopy by means of mid-infrared supercontinuum generation in a step index tellurite fiber

We report on mid-infrared gas spectroscopy measurements by means of the supercontinuum (SC) absorption spectroscopy method. We developed a 80 MHz-repetition-rate mid-infrared SC light source with an average power of 40 mW generated through nonlinear propagation of 200 fs pulses in a 10 cm-long segme...

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Bibliographic Details
Published in:Laser physics 2021-01, Vol.31 (2), p.25702
Main Authors: Lemière, Arnaud, Maldonado, Anthony, Désévédavy, Frédéric, Kibler, Bertrand, Mathey, Pierre, Gadret, Grégory, Jules, Jean-Charles, Hoa, Nguyen Phuoc Trung, Suzuki, Takenobu, Ohishi, Yasutake, Smektala, Frédéric
Format: Article
Language:English
Subjects:
mid-infrared light sources
optical fibers
Optics
Physics
supercontinuum absorption spectroscopy
tellurite glasses
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Summary:We report on mid-infrared gas spectroscopy measurements by means of the supercontinuum (SC) absorption spectroscopy method. We developed a 80 MHz-repetition-rate mid-infrared SC light source with an average power of 40 mW generated through nonlinear propagation of 200 fs pulses in a 10 cm-long segment of step-index tellurite fiber. A compact multipass cell is used for analyzing absorption of CO2 and CH4 gases and their mixture in the 2-3.5 µm spectral range. Experimental results are compared to the HITRAN database.
ISSN:1054-660X
1555-6611
DOI:10.1088/1555-6611/abd9af