Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing

Brumfield, Brian E.; Phillips, Mark C.

Title: Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing

Full Record
Other Related Research

Abstract

A rapidly tunable external cavity quantum cascade laser system is used for open path sensing. The system permits acquisition of transient absorption spectra over a 125 cm-1 tuning range in less than 0.01 s.

Authors:: Brumfield, Brian E.; Phillips, Mark C.

Publication Date:: Wed Jul 01 00:00:00 EDT 2015

Research Org.:: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1222098

Report Number(s):: PNNL-SA-107343
DN2001000

DOE Contract Number:: AC05-76RL01830

Resource Type:: Conference

Resource Relation:: Conference: Conference on Lasers and Electro-Optics (CLEO 2015), May 10-15, 2015, San Jose, California, 1-2

Country of Publication:: United States

Language:: English

Subject:: nfrared spectroscopy; quantum cascade laser; trace gas sensing

Citation Formats


                    Brumfield, Brian E., and Phillips, Mark C. Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing.  United States: N. p., 2015. 
        Web.

Copy to clipboard


                    Brumfield, Brian E., & Phillips, Mark C. Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing.  United States.

Copy to clipboard


                    Brumfield, Brian E., and Phillips, Mark C. 2015.  
        "Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing".  United States.

Copy to clipboard


                    
@article{osti_1222098,

  title        = {Rapid Swept-Wavelength External Cavity Quantum Cascade Laser for Open Path Sensing},

  author       = {Brumfield, Brian E. and Phillips, Mark C.},

  abstractNote = {A rapidly tunable external cavity quantum cascade laser system is used for open path sensing. The system permits acquisition of transient absorption spectra over a 125 cm-1 tuning range in less than 0.01 s.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1222098},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Jul 01 00:00:00 EDT 2015},

  month        = {Wed Jul 01 00:00:00 EDT 2015}

}

Copy to clipboard

Conference:

Other availability

Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Characterization of a swept external cavity quantum cascade laser for rapid broadband spectroscopy and sensing

Journal Article Brumfield, Brian; Taubman, Matthew; Suter, Jonathan; ... - Optics Express

The performance of a rapidly swept external cavity quantum cascade laser (ECQCL) system combined with an open-path Herriott cell was evaluated for time-resolved measurements of chemical species with broad and narrow absorption spectra. A spectral window spanning 1278 – 1390 cm^-1 was acquired at a 200 Hz acquisition rate, corresponding to a tuning rate of 2x10⁴ cm^-1/s, with a spectral resolution of 0.2 cm^-1. The capability of the ECQCL to measure < 100 ppbv changes in N₂O and F134A concentrations on millisecond timescales was demonstrated in simulated plume studies with releases near the open-path Herriott cell. Absorbance spectra measured usingmore »« less
Cited by 20
https://doi.org/10.1364/OE.23.025553

Full Text Available
Demonstration of a rapidly-swept external cavity quantum cascade laser for atmospheric sensing applications

Conference Brumfield, Brian; Taubman, Matthew; Phillips, Mark; ...

The application of quantum cascade lasers (QCLs) in atmospheric science for trace detection of gases has been demonstrated using sensors in point or remote sensing configurations. Many of these systems utilize single narrowly-tunable (~10 cm-1) distributed feedback (DFB-) QCLs that limit simultaneous detection to a restricted number of small chemical species like H2O or N2O. The narrow wavelength range of DFB-QCLs precludes accurate quantification of large chemical species with broad rotationally-unresolved vibrational spectra, such as volatile organic compounds, that play an important role in the chemistry of the atmosphere. External-cavity (EC-) QCL systems are available that offer tuning ranges >100more »« less
https://doi.org/10.15278/isms.2016.TB06
Demonstration of a rapidly-swept external cavity quantum cascade laser for rapid and sensitive quantification of chemical mixtures

Conference Brumfield, Brian; Taubman, Matthew; Phillips, Mark

A rapidly-swept external cavity quantum cascade laser (ECQCL) system for fast open-path quantification of multiple chemicals and mixtures is presented. The ECQCL system is swept over its entire tuning range (>100 cm-1) at frequencies up to 200 Hz. At 200 Hz the wavelength tuning rate and spectral resolution are 2x104 cm-1/sec and < 0.2 cm-1, respectively. The capability of the current system to quantify changes in chemical concentrations on millesecond timescales is demonstrated at atmospheric pressure using an open-path multi-pass cell. The detection limits for chemicals ranged from ppb to ppm levels depending on the absorption cross-section.
https://doi.org/10.1117/12.2214200
Demonstration of a rapidly-swept external cavity quantum cascade laser for rapid and sensitive quantification of chemical mixtures

Conference Brumfield, Brian; Taubman, Matthew; Phillips, Mark

A rapidly-swept external cavity quantum cascade laser (ECQCL) system for fast open-path quantification of multiple chemicals and mixtures is presented. The ECQCL system is swept over its entire tuning range (>100 cm-1) at frequencies up to 200 Hz. At 200 Hz the wavelength tuning rate and spectral resolution are 2x104 cm-1/sec and < 0.2 cm-1, respectively. The capability of the current system to quantify changes in chemical concentrations on millesecond timescales is demonstrated at atmospheric pressure using an open-path multi-pass cell. The detection limits for chemicals ranged from ppb to ppm levels depending on the absorption cross-section.
https://doi.org/10.1117/12.2214200
Real-Time Trace Gas Sensing of Fluorocarbons using a Swept-wavelength External Cavity Quantum Cascade Laser

Journal Article Phillips, Mark; Taubman, Matthew; Bernacki, Bruce; ... - Analyst, 139(9):2047-2056

We present results demonstrating real-time sensing of four different fluorocarbons at low-ppb concentrations using an external cavity quantum cascade laser (ECQCL) operating in a swept-wavelength configuration. The ECQCL was repeatedly swept over its full tuning range at a 20 Hz rate with a scan rate of 3535 cm-1/s, and a detailed characterization of the ECQCL scan stability and repeatability is presented. The sensor was deployed on a mobile automotive platform to provide spatially resolved detection of fluorocarbons in outdoor experiments. Noise-equivalent detection limits of 800-1000 parts-per-trillion (ppt) are demonstrated for 1 s integration times.
https://doi.org/10.1039/c3an01642k

Similar Records