Cavity ringdown strain gauge.

Cavity Ringdown Laser Spectroscopy (CRDS):

Cavity Ringdown Spectroscopy has become a widely used technique in the optical absorption analysis of atoms, molecules, and optical components. The technique allows the determination of total optical losses within a closed cavity comprised of two or more mirrors, and can be made arbitrarily more sensitive by improvments in the cavity mirror reflectivity. Part of the great attraction that Cavity...

Optical injection unlocking for cavity ringdown spectroscopy.

Continuous wave cavity ringdown spectroscopy requires a rapid termination of the injection of light into the cavity to initiate the decay (i.e., ringdown) event. We demonstrate a technique that accomplishes this through pulsed optical injection of a second laser into the main laser, resulting in 20-100 MHz frequency shifts in the otherwise cavity-locked main laser sufficient to create ringdown ...

Cavity Ringdown Spectroscopy of the Ã− X̃ Electronic Transition of the Phenyl Peroxy Radical

Cavity ringdown spectra (CRDS) of the near IR Ã2A′ X̃2A′′ electronic transition of phenyl peroxy radical are reported. The electronic origin is observed at 7497 cm−1. Ab initio calculations have been carried out to aid the assignement of the electronic origin and other bands involving vibrational excitation.

Broadband cavity ringdown spectroscopy for sensitive and rapid molecular detection.

We demonstrate highly efficient cavity ringdown spectroscopy in which a broad-bandwidth optical frequency comb is coherently coupled to a high-finesse optical cavity that acts as the sample chamber. 125,000 optical comb components, each coupled into a specific longitudinal cavity mode, undergo ringdown decays when the cavity input is shut off. Sensitive intracavity absorption information is sim...

Cavity Ringdown Heterodyne Spectroscopy: High Sensitivity with Microwatt Light Power