Mid-infrared heterodyne phase-sensitive dispersion spectroscopy using difference frequency generation
Publisher:
Springer-Verlag GmbH Germany, part of Springer Nature
Issued date:
2018-03-30
Citation:
Applied Physics B, 124, 66 (2018), pp. 1-5
ISSN:
0946-2171
1432-0649 (online)
xmlui.dri2xhtml.METS-1.0.item-contributor-funder:
Ministerio de Economía y Competitividad (España)
Ministerio de Educación, Cultura y Deporte (España)
Sponsor:
The authors would like to thank the Spanish Ministry of Economy and Competitiveness for supporting the project under the Grant TEC-2014-52147-R (MOSSI). The work by Borja Jerez has been performed in the frame of a FPU Program, #FPU014/06338, granted by the Spanish Ministry of Education, Culture and Sports.
Project:
Gobierno de España. TEC-2014-52147-R/MOSSI
Gobierno de España. FPU014/06338
Keywords:
Dispersions
,
Heterodyning
,
Infrared devices
,
Optical communication
,
Quantum cascade lasers
,
Spectroscopic analysis
,
Difference-frequency generation
,
Directly modulated
,
Mid-Infrared quantum cascade
,
Mid-infrared regions
,
Molecular dispersions
,
Multitone signal
,
Nonlinear process
,
Spectroscopic method
,
Optical frequency conversion
Rights:
© Springer-Verlag GmbH Germany, part of Springer Nature 2018
Abstract:
Difference frequency generation is a flexible method for the generation of mid-infrared light. It allows downshifting a near-infrared optical signal to the mid-infrared region by means of a nonlinear process, enabling to take full advantage of the availability
Difference frequency generation is a flexible method for the generation of mid-infrared light. It allows downshifting a near-infrared optical signal to the mid-infrared region by means of a nonlinear process, enabling to take full advantage of the availability of optical communications components for the generation of the multi-tone signals that are characteristic of molecular dispersion spectroscopic methods. In this way, it is possible to avoid several issues associated with optical instruments in which directly modulated mid-infrared quantum cascade lasers are employed. In this paper, we take full advantage of this benefit to implement the first heterodyne phase sensitive dispersion spectroscopy gas sensor based on a difference frequency generation source. The performance of the instrument is validated by detecting with high sensitivity methane in the 3.4 mum mid-infrared band.
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Description:
This article is part of the topical collection "Mid-infrared and THz Laser Sources and Applications" guest edited by Wei Ren, Paolo De Natale and Gerard Wysocki.
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