Cavity-enhanced optical frequency comb spectroscopy in the mid-infrared application to trace detection of hydrogen peroxide
- A. Foltynowicz, P. Masłowski, A. Fleisher, B. Bjork, J. Ye
- Physics
- 6 February 2012
We demonstrate the first cavity-enhanced optical frequency comb spectroscopy in the mid-infrared wavelength region and report the sensitive real-time trace detection of hydrogen peroxide in the…
Multiplexed sub-Doppler spectroscopy with an optical frequency comb.
- D. Long, A. Fleisher, D. Plusquellic, J. Hodges
- PhysicsPhysical review. A
- 20 September 2016
Sub-Doppler optical frequency comb spectroscopy has the potential to dramatically reduce acquisition times and allow for rapid and accurate assignment of complex molecular and atomic spectra which are presently intractable.
Multiheterodyne spectroscopy with optical frequency combs generated from a continuous-wave laser.
- D. Long, A. Fleisher, D. Plusquellic
- PhysicsOptics Letters
- 1 May 2014
Dual-drive Mach-Zehnder modulators were utilized to produce power-leveled optical frequency combs (OFCs) from a continuous-wave laser, which allows for robust measurements of trace gas species and alleviates much of the cost and complexity associated with the use of femtosecond OFCs produced with mode-locked pulsed lasers.
Coherent cavity-enhanced dual-comb spectroscopy.
- A. Fleisher, D. Long, Z. Reed, J. Hodges, D. Plusquellic
- PhysicsOptics Express
- 1 March 2016
This work demonstrates an alternative approach to dual-comb spectroscopy using two phase modulator combs originating from a single continuous-wave laser capable of > 2 hours of coherent real-time averaging and demonstrates the sensitivity to simultaneously monitor ambient levels of CO2, CO, HDO, and H2O in a single spectral region at a maximum acquisition rate of 150 kHz.
Quantum-noise-limited cavity ring-down spectroscopy
- D. Long, A. Fleisher, S. Wójtewicz, J. Hodges
- Physics
- 29 March 2014
We demonstrate a heterodyne-detected cavity ring-down spectroscopy (CRDS) method that allows for a noise-equivalent absorption coefficient of 6 × 10−14 cm−1 Hz−1/2, the lowest which has been reported…
Doppler-Free Two-Photon Cavity Ring-Down Spectroscopy of a Nitrous Oxide (N2O) Vibrational Overtone Transition.
- G. Zhao, D. M. Bailey, A. Fleisher, J. Hodges, K. Lehmann
- PhysicsPhysical review. A
- 27 March 2020
Doppler-free two-photon absorption of N2O at λ = 4.53 μm is reported, measured by cavity ring-down spectroscopy, and a large two- photon cross-section per molecule is reported for the Q(18) rovibrational transition at a resonant frequency of ν 0 = 66179400.
Absolute 13C/12C isotope amount ratio for Vienna PeeDee Belemnite from infrared absorption spectroscopy
- A. Fleisher, H. Yi, A. Srivastava, O. Polyansky, N. Zobov, J. Hodges
- Environmental ScienceNature Physics
- 26 April 2021
Measurements of isotope ratios are predominantly made with reference to standard specimens that have been characterized in the past. In the 1950s, the carbon isotope ratio was referenced to a…
Ultra-sensitive cavity ring-down spectroscopy in the mid-infrared spectral region.
- D. Long, A. Fleisher, Q. Liu, J. Hodges
- PhysicsOptics Letters
- 1 April 2016
An ultra-sensitive cavity ring-down spectrometer which operates in the mid-infrared spectral region near 4.5 μm with a noise-equivalent absorption coefficient of 2.6×10-11 cm-1 Hz-1/2 was demonstrated with less than 150 nW of optical power incident on the photodetector.
Optical Measurement of Radiocarbon below Unity Fraction Modern by Linear Absorption Spectroscopy.
- A. Fleisher, D. Long, Qingnan Liu, L. Gameson, J. Hodges
- Environmental ScienceJournal of Physical Chemistry Letters
- 11 September 2017
Repeated analysis of CO2 derived from the combustion of either biogenic or petrogenic sources revealed a robust ability to differentiate samples with F14C < 1, and initial performance of the calibration-free instrument is sufficient to investigate a variety of applications in radiocarbon measurement science.
Mid-Infrared Time-Resolved Frequency Comb Spectroscopy of Transient Free Radicals.
- A. Fleisher, B. Bjork, T. Bui, K. Cossel, M. Okumura, Jun Ye
- Chemistry, PhysicsJournal of Physical Chemistry Letters
- 16 June 2014
Time-resolved frequency comb spectroscopy (TRFCS) is demonstrated, a new broadband absorptionSpectroscopy technique for the study of trace free radicals on the microsecond timescale that allows for the unraveling of primary and secondary chemical reaction pathways.
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