A proof-of-concept photoelectric detector is proposed for use in low-cost, compact, and
highly sensitive gas sensors. This detector is based on a quartz crystal tuning fork (QCTF) …

We present the design, development, and testing results of a novel laser-based cavity ring-
down spectroscopy (CRDS) sensor for methane detection. The sensor is specifically …

The present work used a near-infrared methane cavity ring-down spectroscopy (CRDS)
sensor to examine performance and limitations of open-path CRDS for atmospheric …

An open-path cavity ring-down spectroscopy (CRDS) sensor has been developed for
measurement of atmospheric ammonia (NH 3) and represents the first use of open-path …

Nitric oxide (NO) in exhaled breath has gained increasing interest in recent years mainly
driven by the clinical need to monitor inflammatory status in respiratory disorders, such as …

Hydrogen chloride is extensively used in industry and its accidental discharge into the
environment is deleterious to various life-forms. Development of minimally sophisticated …

Ambient 0.5 Hz hydrogen chloride (HCl) measurements were made in Canadian cities to
investigate chlorine activation and constrain the tropospheric chlorine budget. Springtime …

The largest inorganic, gas-phase reservoir of chlorine atoms in the atmosphere is hydrogen
chloride (HCl), but challenges in quantitative sampling of this compound cause difficulties for …

Reliable, sensitive, and widely available hydrogen chloride (HCl) measurements are
important for understanding oxidation in many regions of the troposphere. We configured a …

Erbium doped fiber amplifiers play an important role in various applications, spanning from
fiber communication to optical sensing. Unfortunately, their gain bandwidth is limited to …