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We introduce the single envelope equation for the numerical modelling of ultra-broadband optical frequency comb generation via phase-matched parametric mixing in a resonator including both quadratic and cubic nonlinearities.
We theoretically investigate frequency comb generation in dispersive quadratically nonlinear resonators. We introduce a single mean field equation to model cavity enhanced second harmonic generation and find excellent agreement with recent experimental frequency comb observations.
We present theoretical studies of optical frequency comb generation in dispersive quadratically nonlinear resonators. We introduce a mean field equation approach to model cavity enhanced second harmonic generation and find excellent agreement with recent experimental frequency comb observations. We also develop a more general approach based on a single envelope equation for both quadratic and Kerr...
We experimentally demonstrated frequency comb generation in a continuously pumped, cavity-enhanced second-harmonic generation system. Our system shows a striking similarity with generation and dynamics of frequency combs in Kerr microresonators, as confirmed by a simple three-wave theoretical model we developed. This analogy unveils the possibility to predict and observe new effects, paving the way...
We report on a continuous-measurement campaign carried out in Vulcano (Aeolian islands, Sicily), devoted to the simultaneous monitoring of CO2 and H2O concentrations. The measurements were performed with an absorption spectrometer based on a semiconductor laser source emitting around a 2-μm wavelength. The emitted radiation was selectively absorbed by two molecular ro-vibrational transitions specific...
Fundamental spectroscopical parameters of the second overtone band (3<-0) of NO are reported using a high resolution, direct absorption spectrometer, based on a distributed feedback diode laser emitting at 1.8 μm. Line intensity, self- and nitrogen-line broadening coefficients have been measured with high accuracy in the second overtone of NO, for 7 groups of lines belonging to the R branch, from...
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