Quantitative gas sensing by backscatter-absorption measurements of a pseudorandom code modulated λ ∼ 8-μm quantum cascade laser

C. M. Gittins; E. T. Wetjen; C. Gmachl; F. Capasso; A. L. Hutchinson; D. L. Sivco; J. N. Baillargeon; A. Y. Cho

doi:10.1364/OL.25.001162

Quantitative gas sensing by backscatter-absorption measurements of a pseudorandom code modulated λ ∼ 8-μm quantum cascade laser

C. M. Gittins, E. T. Wetjen, C. Gmachl, F. Capasso, A. L. Hutchinson, D. L. Sivco, J. N. Baillargeon, A. Y. Cho

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

24 Scopus citations

Abstract

We have demonstrated quantitative chemical vapor detection with a multimode quantum cascade (QC) laser. Experiments incorporated pseudorandom code (PRC) modulation of the laser intensity to permit sensitive absorption measurements of isopropanol vapor at 8.0 μm. The demonstration shows the practicality of one technical approach for implementing low-peak-power QC lasers in the transmitter portion of a differential absorption lidar (DIAL) system. With a 31-chip, 300-ns/chip PRC sequence, the measured isopropanol detection limit was 12 parts in 10⁶ by volume times meters (∼3 × 10^-3 absorption) for a simple backscatter-absorption measurement configuration.

Original language	English (US)
Pages (from-to)	1162-1164
Number of pages	3
Journal	Optics Letters
Volume	25
Issue number	16
DOIs	https://doi.org/10.1364/OL.25.001162
State	Published - Aug 15 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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10.1364/OL.25.001162

Cite this

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title = "Quantitative gas sensing by backscatter-absorption measurements of a pseudorandom code modulated λ ∼ 8-μm quantum cascade laser",

abstract = "We have demonstrated quantitative chemical vapor detection with a multimode quantum cascade (QC) laser. Experiments incorporated pseudorandom code (PRC) modulation of the laser intensity to permit sensitive absorption measurements of isopropanol vapor at 8.0 μm. The demonstration shows the practicality of one technical approach for implementing low-peak-power QC lasers in the transmitter portion of a differential absorption lidar (DIAL) system. With a 31-chip, 300-ns/chip PRC sequence, the measured isopropanol detection limit was 12 parts in 106 by volume times meters (∼3 × 10-3 absorption) for a simple backscatter-absorption measurement configuration.",

author = "Gittins, {C. M.} and Wetjen, {E. T.} and C. Gmachl and F. Capasso and Hutchinson, {A. L.} and Sivco, {D. L.} and Baillargeon, {J. N.} and Cho, {A. Y.}",

year = "2000",

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doi = "10.1364/OL.25.001162",

language = "English (US)",

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T1 - Quantitative gas sensing by backscatter-absorption measurements of a pseudorandom code modulated λ ∼ 8-μm quantum cascade laser

AU - Gittins, C. M.

AU - Wetjen, E. T.

AU - Gmachl, C.

AU - Capasso, F.

AU - Hutchinson, A. L.

AU - Sivco, D. L.

AU - Baillargeon, J. N.

AU - Cho, A. Y.

PY - 2000/8/15

Y1 - 2000/8/15

N2 - We have demonstrated quantitative chemical vapor detection with a multimode quantum cascade (QC) laser. Experiments incorporated pseudorandom code (PRC) modulation of the laser intensity to permit sensitive absorption measurements of isopropanol vapor at 8.0 μm. The demonstration shows the practicality of one technical approach for implementing low-peak-power QC lasers in the transmitter portion of a differential absorption lidar (DIAL) system. With a 31-chip, 300-ns/chip PRC sequence, the measured isopropanol detection limit was 12 parts in 106 by volume times meters (∼3 × 10-3 absorption) for a simple backscatter-absorption measurement configuration.

AB - We have demonstrated quantitative chemical vapor detection with a multimode quantum cascade (QC) laser. Experiments incorporated pseudorandom code (PRC) modulation of the laser intensity to permit sensitive absorption measurements of isopropanol vapor at 8.0 μm. The demonstration shows the practicality of one technical approach for implementing low-peak-power QC lasers in the transmitter portion of a differential absorption lidar (DIAL) system. With a 31-chip, 300-ns/chip PRC sequence, the measured isopropanol detection limit was 12 parts in 106 by volume times meters (∼3 × 10-3 absorption) for a simple backscatter-absorption measurement configuration.

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JO - Optics Letters

JF - Optics Letters

IS - 16

ER -

Quantitative gas sensing by backscatter-absorption measurements of a pseudorandom code modulated λ ∼ 8-μm quantum cascade laser

Abstract

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