Recent advances in evanescent-wave cavity ring-down spectroscopy

Detection of chemicals using a novel fiber-optic sensor element built in fiber loop ring-resonators

“…Pipino et al [20,21] developed a novel implementation of CRDS that extends the technique to surfaces and condensed media. Evanescent wave cavity ring-down spectroscopy (EW-CRDS) utilizes novel optical cavity designs that employ total internal reflection (TIR) at ultra-smooth surfaces which have a root-mean square surface roughness of typically less than an atomic diameter [22].…”