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Author: kevin douglass
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1. Chirped-pulse terahertz spectroscopy for broadband trace gas sensing
Published: 4/22/2011
Authors: Eyal Gerecht, Kevin O Douglass, David F Plusquellic
Abstract: We report the first demonstration of a broadband trace gas sensor based on chirp-pulse terahertz spectroscopy. The advent of newly developed solid state sources and heterodyne detectors for the terahertz frequency range have made it possible to gener ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907773

2. Construction of a High Power OPO Laser system for Differential Absorption LIDAR
Published: 9/13/2011
Authors: Kevin O Douglass, Stephen E Maxwell, David F Plusquellic, Joseph Terence Hodges, Roger D van Zee, Daniel Victor Samarov, James R Whetstone
Abstract: Our goal is to develop and characterize optical measurement technology to enable accurate quantification of greenhouse-gas emissions to meet the needs of industry and regulators. A 1064 nm pumped high energy optical parametric oscillator (OPO) opera ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=909253

3. Frequency-agile, rapid scanning spectroscopy
Published: 4/28/2013
Authors: Gar-Wing Truong, Kevin O Douglass, Stephen E Maxwell, Roger D van Zee, David F Plusquellic, Joseph Terence Hodges, David A Long
Abstract: Challenging applications in trace gas analyses require high precision and acquisition rates.1-4 Many continuous-wave laser spectroscopy techniques exhibit significant sensitivity and potential;5 however, their scanning rates are slow because they rel ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=912076

4. Microwave measurements of proton tunneling and structural parameters for the propiolic acid ‹ formic acid dimer.
Published: 10/21/2011
Authors: Adam M Daly, Kevin O Douglass, Laszlo C Sarkozy, Justin L. Neill, Matt T Muckle, Daniel P Zaleski, Brooks H Pate, Stephen G Kukolich
Abstract: Microwave spectra of the propiolic acid-formic acid, (Pro-FA) doubly hydrogen bonded complex were measured in the 1-21 GHz range. Rotational spectra for seven isotopomers were obtained and fit. For the parent isotopomer, a total of 138 a-dipole tra ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=908927

5. Multiheterodyne spectroscopy with optical frequency combs generated from a continuous-wave laser
Published: 5/1/2014
Authors: David A Long, Adam J Fleisher, Kevin O Douglass, Stephen E Maxwell, Katarzyna Ewelina Bielska, Joseph Terence Hodges, David F Plusquellic
Abstract: Dual-drive Mach-Zehnder modulators were utilized to produce power-leveled optical frequency combs (OFCs) from a continuous-wave laser. The resulting OFCs contained up to fifty unique frequency components and spanned more than 200 GHz. Simple changes ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915142

6. Rapid scan absorption spectroscopy using a waveform-driven electro-optic phase modulator in the 1.6- 1.65 {mu}m region
Published: 9/25/2013
Authors: Kevin O Douglass, Stephen E Maxwell, Gar-Wing Truong, Roger D van Zee, Joseph Terence Hodges, David A Long, David F Plusquellic
Abstract: A method is reported for performing fast optical frequency scans over a bandwidth of 36.9 GHz and at a sweep rate of 40 kHz using a single second-order sideband from an electro-optic phase modulator driven by an arbitrary waveform generator. Sing ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913748

7. Rotational Spectroscopy of Vibrationally Excited States by Infrared-Fourier Transform Microwave-Microwave Triple-Resonance Spectroscopy
Published: 1/1/2003
Authors: Kevin O Douglass, J C Keske, F S Rees, K Welch, H S Yoo, Brooks H Pate, I Lenov, R D. Suenram
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=104410

8. Rotationally Resolved C2 Symmetric Conformers of Bis-(4-hydroxyphenyl)methane: Textbook Examples of Excitonic Coupling in the S1 and S2 Electronic States
Published: 9/1/2011
Authors: Shin G. Chou, Chirantha P. Rodrigo, Christian Muller, Kevin O Douglass, Timothy Zwier, David F Plusquellic
Abstract: Rotationally resolved microwave and ultraviolet spectra of jet-cooled bis-4 hydroxy)-diphenylmethane (b4HBM) have been obtained using Fourier-transform microwave and UV laser/molecular beam spectrometers. A recent vibronic level study of b4HPM1 has ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907835

9. Rotationally Resolved Studies of the Exciton Coupled S1/S2 Origin Regions of Diphenylmethane and the d12 Isotopologue
Published: 12/9/2008
Authors: David F Plusquellic, Kevin O Douglass, Jaime Stearns, Nathan Pillsbury, Timothy Zwier, Christian Muller
Abstract: Rotationally resolved microwave and ultraviolet spectra of jet-cooled diphenylmethane (DPM) and DPM-d^12 have been obtained in S^d0, S^d1 and S2 electronic states using Fourier-transform microwave and UV laser/molecular beam spectrometers. The S0 and ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=842541

10. Segmented chirped-pulse Fourier transform submillimeter spectroscopy for broadband gas analysis
Published: 8/15/2013
Authors: Justin L. Neill, Brent J. Harris, Amanda L. Steber, Kevin O Douglass, David F Plusquellic, Brooks H. Pate
Abstract: Chirped-pulse Fourier transform spectroscopy has recently been extended to millimeter wave spectroscopy as a technique for the characterization of room-temperature gas samples. Here we present a variation of this technique that significantly redu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913245



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