Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy

Anatoliy A. Kosterev; Robert F. Curl; Frank K. Tittel; Claire Gmachl; Federico Capasso; Deborah L. Sivco; James N. Baillargeon; Albert L. Hutchinson; Alfred Y. Cho

doi:10.1364/AO.39.004425

Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy

Anatoliy A. Kosterev, Robert F. Curl, Frank K. Tittel, Claire Gmachl, Federico Capasso, Deborah L. Sivco, James N. Baillargeon, Albert L. Hutchinson, Alfred Y. Cho

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

92 Scopus citations

Abstract

A variable duty cycle quasi-cw frequency scanning technique was applied to reduce thermal effects resulting from the high heat dissipation of type I quantum-cascade lasers. This technique was combined with a 100-m path-length multipass cell and a zero-air background-subtraction technique to enhance detection sensitivity to a parts-in-10⁹(ppb) concentration level for spectroscopic trace-gas detection of CH₄, N₂O, H₂O, and C₂H₅OH in ambient air at 7.9 μm. A new technique for analysis of dense highresolution absorption spectra was applied to detection of ethanol in ambient air, yielding a 125-ppb detection limit.

Original language	English (US)
Pages (from-to)	4425-4430
Number of pages	6
Journal	Applied Optics
Volume	39
Issue number	24
DOIs	https://doi.org/10.1364/AO.39.004425
State	Published - Aug 20 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Engineering (miscellaneous)
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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10.1364/AO.39.004425

Cite this

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title = "Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy",

abstract = "A variable duty cycle quasi-cw frequency scanning technique was applied to reduce thermal effects resulting from the high heat dissipation of type I quantum-cascade lasers. This technique was combined with a 100-m path-length multipass cell and a zero-air background-subtraction technique to enhance detection sensitivity to a parts-in-109(ppb) concentration level for spectroscopic trace-gas detection of CH4, N2O, H2O, and C2H5OH in ambient air at 7.9 μm. A new technique for analysis of dense highresolution absorption spectra was applied to detection of ethanol in ambient air, yielding a 125-ppb detection limit.",

author = "Kosterev, {Anatoliy A.} and Curl, {Robert F.} and Tittel, {Frank K.} and Claire Gmachl and Federico Capasso and Sivco, {Deborah L.} and Baillargeon, {James N.} and Hutchinson, {Albert L.} and Cho, {Alfred Y.}",

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T1 - Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy

AU - Kosterev, Anatoliy A.

AU - Curl, Robert F.

AU - Tittel, Frank K.

AU - Gmachl, Claire

AU - Capasso, Federico

AU - Sivco, Deborah L.

AU - Baillargeon, James N.

AU - Hutchinson, Albert L.

AU - Cho, Alfred Y.

PY - 2000/8/20

Y1 - 2000/8/20

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AB - A variable duty cycle quasi-cw frequency scanning technique was applied to reduce thermal effects resulting from the high heat dissipation of type I quantum-cascade lasers. This technique was combined with a 100-m path-length multipass cell and a zero-air background-subtraction technique to enhance detection sensitivity to a parts-in-109(ppb) concentration level for spectroscopic trace-gas detection of CH4, N2O, H2O, and C2H5OH in ambient air at 7.9 μm. A new technique for analysis of dense highresolution absorption spectra was applied to detection of ethanol in ambient air, yielding a 125-ppb detection limit.

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Effective utilization of quantum-cascade distributed-feedback lasers in absorption spectroscopy

Abstract

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