Infrared cavity ringdown and integrated cavity output spectroscopy for trace species monitoring

J. B. Paul; J. J. Scherer; A. O'Keefe; L. Lapson; J. G. Anderson; C. Gmachl; F. Capasso; A. Y. Cho

doi:10.1117/12.455722

Infrared cavity ringdown and integrated cavity output spectroscopy for trace species monitoring

J. B. Paul, J. J. Scherer, A. O'Keefe, L. Lapson, J. G. Anderson, C. Gmachl, F. Capasso, A. Y. Cho

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

28 Scopus citations

Abstract

Although the ability of high finesse optical cavities to provide effective absorption path-lengths exceeding 10 km. has been known for quite some time, attempts to utilize this property for the purposes of high-resolution spectroscopy have often resulted in extremely complex experimental systems. Here, we demonstrate how off-axis optical paths through such cavities can be employed to produce relatively simple spectrometers capable of ultrasensitive absorption measurements. A proof-of-concept study using visible diode lasers has achieved a normalized absorption sensitivity of 1.8*10^-10 cm^-1Hz^-1/2. Additionally, quantum cascade lasers have been employed to extend this method into the mid-infrared region, where sensitivities of 1.2*10^-9 cm^-1Hz^-1/2 have been obtained.

Original language	English (US)
Pages (from-to)	1-11
Number of pages	11
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	4577
DOIs	https://doi.org/10.1117/12.455722
State	Published - 2001
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Computer Science Applications
Applied Mathematics
Electrical and Electronic Engineering

Keywords

Absorption spectroscopy
Optical cavity
Quantum cascade laser
Trace-gas detection

Access to Document

10.1117/12.455722

Cite this

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abstract = "Although the ability of high finesse optical cavities to provide effective absorption path-lengths exceeding 10 km. has been known for quite some time, attempts to utilize this property for the purposes of high-resolution spectroscopy have often resulted in extremely complex experimental systems. Here, we demonstrate how off-axis optical paths through such cavities can be employed to produce relatively simple spectrometers capable of ultrasensitive absorption measurements. A proof-of-concept study using visible diode lasers has achieved a normalized absorption sensitivity of 1.8*10-10 cm-1Hz-1/2. Additionally, quantum cascade lasers have been employed to extend this method into the mid-infrared region, where sensitivities of 1.2*10-9 cm-1Hz-1/2 have been obtained.",

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AU - Paul, J. B.

AU - Scherer, J. J.

AU - O'Keefe, A.

AU - Lapson, L.

AU - Anderson, J. G.

AU - Gmachl, C.

AU - Capasso, F.

AU - Cho, A. Y.

PY - 2001

Y1 - 2001

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AB - Although the ability of high finesse optical cavities to provide effective absorption path-lengths exceeding 10 km. has been known for quite some time, attempts to utilize this property for the purposes of high-resolution spectroscopy have often resulted in extremely complex experimental systems. Here, we demonstrate how off-axis optical paths through such cavities can be employed to produce relatively simple spectrometers capable of ultrasensitive absorption measurements. A proof-of-concept study using visible diode lasers has achieved a normalized absorption sensitivity of 1.8*10-10 cm-1Hz-1/2. Additionally, quantum cascade lasers have been employed to extend this method into the mid-infrared region, where sensitivities of 1.2*10-9 cm-1Hz-1/2 have been obtained.

KW - Absorption spectroscopy

KW - Optical cavity

KW - Quantum cascade laser

KW - Trace-gas detection

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Infrared cavity ringdown and integrated cavity output spectroscopy for trace species monitoring

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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