213 citations · 730 across the 21 of their papers we have counts for
21 papers
Complete reactants-to-products observation of a gas-phase chemical reaction with broad, fast mid-infrared frequency combs
Nazanin Hoghooghi, Peter Chang, Scott Egbert Matt Burch +4
Molecular diagnostics are a primary tool of modern chemistry, enabling researchers to map chemical reaction pathways and rates to better design and control chemical systems. Many c…
Nanosecond time-resolved dual-comb absorption spectroscopy
David A. Long, Matthew J. Cich, Carl Mathurin +4
Frequency combs have revolutionized the field of optical spectroscopy, enabling researchers to probe molecular systems with a multitude of accurate and precise optical frequencies.…
Supersonic Combustion Diagnostics with Dual Comb Spectroscopy
David Yun, Nathan A. Malarich, Ryan K. Cole +9
Supersonic engine development requires accurate and detailed measurements of fluidic and thermodynamic parameters to optimize engine designs and benchmark computational fluid dynam…
Spatially resolved mass flux measurements with dual comb spectroscopy
David Yun, Ryan K. Cole, Nathan A. Malarich +8
Providing an accurate, representative sample of mass flux across large open areas for atmospheric studies or the extreme conditions of a hypersonic engine is challenging for tradit…
1-GHz mid-infrared frequency comb spanning 3 to 13 μm
Nazanin Hoghooghi, Sida Xing, Peter Chang +4
Mid-infrared (MIR) spectrometers are invaluable tools for molecular fingerprinting and hyper-spectral imaging. Among the available spectroscopic approaches, GHz MIR dual-comb absor…
Demonstration of a uniform, high-pressure, high-temperature gas cell with a dual frequency comb absorption spectrometer
Ryan K. Cole, Anthony D. Draper, Paul J. Schroeder +6
Accurate absorption models for gases at high pressure and temperature support advanced optical combustion diagnostics and aid in the study of harsh planetary atmospheres. Developin…
Efficient Simulations of Propagating Flames Using Adaptive Mesh Refinement
Caelan Lapointe, Nicholas T. Wimer, Jeffrey F. Glusman +5
Wildland fires are complex multi-physics problems that span wide spatial scale ranges. Capturing this complexity in computationally affordable numerical simulations for process stu…
Resolving nonuniform temperature distributions with single-beam absorption spectroscopy. Part II: Implementation from broadband spectra
Nathan Malarich, Greg Rieker
Several past studies have described how absorption spectroscopy can be used to determine spatial temperature variations along the optical path by measuring the unique, nonlinear re…
Long Distance Continuous Methane Emissions Monitoring with Dual Frequency Comb Spectroscopy: deployment and blind testing in complex emissions scenarios
Sean Coburn, Caroline B. Alden, Robert Wright +5
Continuous monitoring of oil and gas infrastructure is of interest for improving emissions and safety by enabling rapid identification and repair of emission sources, especially la…
Resolving nonuniform temperature distributions with single-beam absorption spectroscopy. Part I: Theoretical capabilities and limitations
Nathan A Malarich, Gregory B Rieker
Absorption spectroscopy is traditionally used to determine the average gas temperature and species concentration along the laser line-of-sight by measuring the magnitude of two or…
Cepstral Analysis for Baseline-Insensitive Absorption Spectroscopy Using Light Sources with Pronounced Intensity Variations
Christopher S. Goldenstein, Garrett C. Mathews, Ryan K. Cole +2
This manuscript presents a data-processing technique which improves the accuracy and precision of absorption-spectroscopy measurements by isolating the molecular absorbance signal…
Fully phase-stabilized 1 GHz turnkey frequency comb at 1.56 m
Daniel M. B. Lesko, Alexander J. Lind, Nazanin Hoghooghi +7
Low noise and high repetition rate optical frequency combs are desirable for many applications from timekeeping to precision spectroscopy. For example, gigahertz repetition rate so…
11-μs Time-resolved, Continuous Dual-Comb Spectroscopy with Spectrally Filtered Mode-locked Frequency Combs
Nazanin Hoghooghi, Ryan K. Cole, Gregory B. Rieker
Broadband dual-comb spectroscopy (DCS) based on portable mode-locked fiber frequency combs is a powerful tool for in situ, calibration free, multi-species spectroscopy. While the a…
Baseline-free Quantitative Absorption Spectroscopy Based on Cepstral Analysis
Ryan K. Cole, Amanda S. Makowiecki, Nazanin Hoghooghi +1
The accuracy of quantitative absorption spectroscopy depends on correctly distinguishing molecular absorption signatures in a measured transmission spectrum from the varying intens…
The Need for Laboratory Measurements and Ab Initio Studies to Aid Understanding of Exoplanetary Atmospheres
Jonathan J. Fortney, Tyler D. Robinson, Shawn Domagal-Goldman +85
We are now on a clear trajectory for improvements in exoplanet observations that will revolutionize our ability to characterize their atmospheric structure, composition, and circul…
Scaling of the Puffing Strouhal Number for Buoyant Jets
Nicholas T. Wimer, Caelan Lapointe, Jason D. Christopher +6
Prior research has shown that round and planar buoyant jets "puff" at a frequency that depends on the balance of momentum and buoyancy fluxes at the inlet, as parametrized by the R…
High-Resolution Numerical Simulations of a Large-Scale Helium Plume Using Adaptive Mesh Refinement
Nicholas T. Wimer, Marcus S. Day, Caelan Lapointe +5
The physical characteristics and evolution of a large-scale helium plume are examined through a series of numerical simulations with increasing physical resolution using adaptive m…
Broadband Dual Frequency Comb Spectroscopy in a Rapid Compression Machine
Anthony D. Draper, Ryan K. Cole, Amanda S. Makowiecki +5
We demonstrate fiber mode-locked dual frequency comb spectroscopy for broadband, high resolution measurements in a rapid compression machine (RCM). We apply an apodization techniqu…
Continuous regional trace gas source attribution using a field-deployed dual frequency comb spectrometer
Sean Coburn, Caroline B. Alden, Robert Wright +9
Identification and quantification of trace gas sources is a major challenge for understanding and regulating air quality and greenhouse gas emissions. Current approaches either pro…
Frequency Comb-Based Remote Sensing of Greenhouse Gases over Kilometer Air Paths
Gregory B. Rieker, Fabrizio R. Giorgetta, William C. Swann +10
We demonstrate coherent dual frequency-comb spectroscopy for detecting variations in greenhouse gases. High signal-to-noise spectra are acquired spanning 5990 to 6260 cm^-1 (1600 t…
Operation of an optically coherent frequency comb outside the metrology lab
Laura C. Sinclair, Ian Coddington, William C. Swann +4
We demonstrate a self-referenced fiber frequency comb that can operate outside the well-controlled optical laboratory. The frequency comb has residual optical linewidths of < 1 Hz,…