Cavity ring-down spectroscopy~CRDS! is a new laser absorption technique that has the potential for the quantita-tive detection of atomic and molecular species with a high sensitivity, comparable to photoacoustic spectroscopy. CRDS was first demonstrated by O'Keefe and Deacon in 1988.1 In

Abstract We report preliminary results descri two new applications of cavity ring-down spectroscopy (CRDS): 1) detection of non-absor species by refractive-index change using surface-plasmon-resonance (SPR)-enhanced CRDS, and 2) C-H overtone detection by evanescent wave CRDS with a determination of absolute adsorbate surface coverage.

Based on absorption spectroscopy, the Tiger Optics’ Cavity Ring-Down Spectroscopy (CRDS) works by attuning light rays to the unique molecular fingerprint of the sample species. By measuring the time, it takes the light to fade or “ring-down”, you receive an accurate molecular count in milliseconds.

The ringdown signals were obtained at an event rate of around 200 signals s −1 in each case, as determined by the cavity piezo scanning speed. However, with optical feedback, the coupling to the cavity is more efficient so that the higher transmission signal was observed so that the AD decreased by half with feedback for small averaging time.

A cavity ring down Faraday rotation spectrometer has been developed for oxygen detection at 762.6 nm. The system incorporates a differential measurement scheme for simultaneous detection of cavity losses in two orthogonal polarizations. Cavity Ring Down Faraday Rotation Spectroscopy for Oxygen Detection. In CLEO: Applications and Technology

T1 - Optical amplifier assisted cavity ring down spectroscopy (CRDS) method for compact infrared sensing. AU - Tsujino, Miki. AU - Hokazono, Hirohito. AU - Chen, Jiao. AU - Hamamoto, Kiichi. PY - 2013. Y1 - 2013. N2 - Waveguide based CRDS is attractive for its possibility of realizing compact breath sensing system. The waveguide propagation

Applications of cavity ring-down spectroscopy (CRDS) with a semiconductor laser are compared with LIF and PAS. Then, as an advanced analytical technique, fiber- 

Cavity ring-down spectroscopy (CRDS) is a direct absorption spectroscopy method using a high-finesse optical cavity to enhance the effective absorption path length. Very high sensitivity has been

Surface-Cavity Ring-Down Spectroscopy s-CRDS is a direct absorption measurement technique in which the rate of absorption rather than the magnitude of the absorption of a light pulse confined in an optical cavity is measured. The sample is placed inside a high-finesse optical cavity consisting of two highly reflective mirrors.

Cavity ring-down spectroscopy (CRDS) is a new-generation, ultra-high sensitive, direct absorption technique which was first pioneered by O'Keefe and Deacon, in 1988 [1]. CRDS technique enables cavity-enhanced absorption measurements of weak absor species with ultra-low concentration.

1 An Introduction to Cavity Ring-Down Spectroscopy 1 Kevin K. Lehmann, Giel Berden and Richard Engeln 1.1 Introduction 1 1.2 Direct Absorption Spectroscopy 3 1.3 Basic Cavity Ring