1.Istituto Nazionale di Ottica (INO)—CNR,Firenze,Italy;2.European Laboratory for Nonlinear Spectroscopy (LENS),Sesto Fiorentino,Italy;3.Istituto Nazionale di Ottica (INO)—CNR,Pozzuoli,Italy
Abstract:
We report on recent development of IR spectrometers based on non-linear optical generation and quantum-cascade lasers. Frequency
stabilization and referencing to optical frequency-comb synthesizers is described. Their characteristics for spectroscopic
as well as metrological applications are pointed out. The potential of the combination of mid-IR sources with enhancement
cavities for high-resolution and sensitive measurements of gas spectra is illustrated. Finally, we describe wave-front engineering
of long wavelength beams for spatial control and imaging applications.