Raman spectroscopy is a powerful method for gas sensing but is limited by the inherently
weak Raman effect. Due to the increase in intracavity laser power or improvement in …

Quantum cascade lasers (QCLs) are becoming a key tool for plenty of applications, from the
mid-infrared (mid-IR) to the THz range. Progress in related areas, such as the development …

We demonstrate the first cavity-enhanced optical frequency comb spectroscopy in the mid-
infrared wavelength region and report the sensitive real-time trace detection of hydrogen …

We present an atmospheric version, CDSD-296, of the carbon dioxide spectroscopic
databank (CDSD). The databank contains the calculated line parameters (positions …

Quantum cascade lasers (QCLs) are becoming a key tool in several advanced experiments
in the field of precision molecular spectroscopy and absolute frequency metrology. In view of …

The frequency of a terahertz quantum-cascade laser is stabilized to the absorption line of
methanol gas at a frequency of 2.55 THz. The method is based on frequency modulation of …

We report on the narrowing of a room-temperature mid-IR quantum cascade laser by
frequency locking it to a CO2 sub-Doppler transition obtained by polarization spectroscopy …

The recent availability of thermoelectrically cooled pulsed and continuous wave quantum
and inter-band cascade lasers in the mid-infrared spectral region has led to significant …

By measuring the frequency-noise power spectral density of a cryogenically-cooled mid-
infrared quantum cascade laser, we investigate the different contributions to the noise …

Thanks to the advent of optical frequency comb synthesizers, based on femto-second mode-
locked lasers, the field of optical frequency metrology has experienced an extraordinary …