Laser-locked, high-repetition-rate cavity ringdown spectrometer

Frequency-comb-referenced mid-infrared source for high-precision spectroscopy

“…For applications that require even better frequency accuracy, further improvements can be obtained by increasing the locking bandwidth and by using a phase-locked loop, which is a standard technique for laser stabilization to an OFC [1,4]. The accuracy of cavity-ring-downspectroscopy can be improved by stabilizing the ring-down-cavity length by locking the laser to it [6,30].…”

Inefficient Vibrational Cooling of C60 in a Supersonic Expansion

“…Studies where laser desorption [43,44] or collisional cooling [47] was used do not report gas-phase C 60 number densities; however, the C 60 number densities generated using these methods will be considerably lower than the number density produced using a supercritical fluid. Assuming that C 60 can be efficiently cooled in a supercritical fluid expansion, we will need to implement high repetition rate CRDS [50] to account for the low C 60 number density. Depending on the repetition rate achieved, doing so would improve / by a factor of 10-20.…”

From Carbon Nanostructures to New Photoluminescence Sources: An Overview of New Perspectives and Emerging Applications of Low‐Pressure PECVD

“…[62] An interesting description of the presently most employed spectrometric methods for the detection of radicals can also be found in the literature. [63] Among the presently available experimental methods based on the use of lasers for plasma diagnostics, diode laser absorption and the very sensitive technique of cavity ring-down spectroscopy [64,65] have experienced great advances during the last years. The recently developed quantum cascade lasers operating with short IR pulses at room temperature are very promising mid-infrared radiation sources for plasma characterization.…”