We present field deployment results of a portable optical absorption spectrometer for
localization and quantification of fugitive methane (CH4) emissions. Our near-infrared …

In this paper, we present the development and testing of a balanced Zeeman spectroscopy
method utilizing wavelength modulation for selective detection of paramagnetic molecules …

We present the intra-cavity Faraday modulation spectroscopy technique, whereby optical
feedback cavity-enhanced spectroscopy is coupled with Faraday modulation spectroscopy …

We present a fully integrated photonic chip spectrometer for near-infrared tunable diode
laser absorption spectroscopy of methane (CH 4). The integrated photonic sensor …

A rapidly-swept external-cavity quantum cascade laser with an open-path Herriott cell is
used to quantify gas-phase chemical mixtures of D2O and HDO at a rate of 40 Hz (25-ms …

A swept-ECQCL is used for broadband IR spectroscopy of isotopic mixtures of CH3OH,
CH3OD, CH3CH2OH, and CH3CH2OD in a static gas cell over a wavelength range of 9.5 to …

We report the development of a static magnetic field Faraday rotation spectrometer for NO
detection. A 5.33 µm continuous-wave quantum cascade laser was used as the probing …

In this dissertation, laser spectroscopy is utilized to monitor trace-gas species for
environmental and health applications. Due to their non-invasive and in situ sensing …

Multi-pass cell-enhanced Faraday rotation spectroscopy for paramagnetic gas species is
affected by elliptical polarization introduced by interactions within the cell mirrors. We …

We present real-time optical polarization subtraction for calibration of Faraday rotation
spectra. Noise analysis yields minor isotope sensitivity of 3.0 ppbv· Hz− 1/2 and 1.7× 10− 8 …