Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser

Andreas Hangauer; Georg Spinner; Michal Nikodem; Gerard Wysocki

doi:10.1063/1.4829036

Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser

Andreas Hangauer, Georg Spinner, Michal Nikodem, Gerard Wysocki

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

Chirped laser dispersion spectroscopy (CLaDS) utilizing direct modulation of a quantum cascade laser (QCL) is presented. By controlling the laser bias nearly single- and dual-sideband CLaDS operation can be realized in an extremely simplified optical setup with no external optical modulators. Capability of direct single-sideband modulation is a unique feature of QCLs that exhibit a low linewidth enhancement factor. The developed analytical model shows excellent agreement with the experimental, directly modulated CLaDS spectra. This method overcomes major technical limitations of mid-infrared CLaDS systems by allowing significantly higher modulation frequencies and eliminating optical fringes introduced by external modulators.

Original language	English (US)
Article number	191107
Journal	Applied Physics Letters
Volume	103
Issue number	19
DOIs	https://doi.org/10.1063/1.4829036
State	Published - Nov 4 2013

All Science Journal Classification (ASJC) codes

Physics and Astronomy (miscellaneous)

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10.1063/1.4829036

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title = "Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser",

abstract = "Chirped laser dispersion spectroscopy (CLaDS) utilizing direct modulation of a quantum cascade laser (QCL) is presented. By controlling the laser bias nearly single- and dual-sideband CLaDS operation can be realized in an extremely simplified optical setup with no external optical modulators. Capability of direct single-sideband modulation is a unique feature of QCLs that exhibit a low linewidth enhancement factor. The developed analytical model shows excellent agreement with the experimental, directly modulated CLaDS spectra. This method overcomes major technical limitations of mid-infrared CLaDS systems by allowing significantly higher modulation frequencies and eliminating optical fringes introduced by external modulators.",

author = "Andreas Hangauer and Georg Spinner and Michal Nikodem and Gerard Wysocki",

note = "Funding Information: The authors would like to acknowledge financial support by the NSF CAREER award CMMI-0954897 and by the NSF SECO award EEC-1128282 and thank G. Plant and B. Brumfield for useful comments.",

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doi = "10.1063/1.4829036",

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T1 - Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser

AU - Hangauer, Andreas

AU - Spinner, Georg

AU - Nikodem, Michal

AU - Wysocki, Gerard

N1 - Funding Information: The authors would like to acknowledge financial support by the NSF CAREER award CMMI-0954897 and by the NSF SECO award EEC-1128282 and thank G. Plant and B. Brumfield for useful comments.

PY - 2013/11/4

Y1 - 2013/11/4

N2 - Chirped laser dispersion spectroscopy (CLaDS) utilizing direct modulation of a quantum cascade laser (QCL) is presented. By controlling the laser bias nearly single- and dual-sideband CLaDS operation can be realized in an extremely simplified optical setup with no external optical modulators. Capability of direct single-sideband modulation is a unique feature of QCLs that exhibit a low linewidth enhancement factor. The developed analytical model shows excellent agreement with the experimental, directly modulated CLaDS spectra. This method overcomes major technical limitations of mid-infrared CLaDS systems by allowing significantly higher modulation frequencies and eliminating optical fringes introduced by external modulators.

AB - Chirped laser dispersion spectroscopy (CLaDS) utilizing direct modulation of a quantum cascade laser (QCL) is presented. By controlling the laser bias nearly single- and dual-sideband CLaDS operation can be realized in an extremely simplified optical setup with no external optical modulators. Capability of direct single-sideband modulation is a unique feature of QCLs that exhibit a low linewidth enhancement factor. The developed analytical model shows excellent agreement with the experimental, directly modulated CLaDS spectra. This method overcomes major technical limitations of mid-infrared CLaDS systems by allowing significantly higher modulation frequencies and eliminating optical fringes introduced by external modulators.

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Chirped laser dispersion spectroscopy using a directly modulated quantum cascade laser

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