High-temperature hypersonic Laval nozzle for non-LTE cavity ringdown spectroscopy

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 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...

Deep-ultraviolet cavity ringdown spectroscopy.

The sensitive optical detection technique of cavity ringdown spectroscopy is extended to the wavelength range 197-204 nm. A novel design narrowband Fourier-transform-limited laser is used, and the technique is applied to gas-phase extinction measurements in CO2, SF6, and O2. Further demonstration of the system capabilities is given in high-resolution recordings of the Schumann-Runge (0, 0), (1,...

Cavity Ringdown Heterodyne Spectroscopy: High Sensitivity with Microwatt Light Power

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...