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Intra-cavity spectra of ultra-long (up to 84 km cavity length) Raman lasers have been measured and simulated. The results demonstrate FWM-induced turbulent-like (involving up to 108 modes) broadening of the spectrum with clear exponential tails.
This paper presents the study of special nonlinear transmission lines (NLTLs) designed for the generation of millimeter waves with high efficiencies. In particular, so called bi-modal NLTLs are described which are characterized by a prescribed dispersion in order to establish phase matching condition for the frequencies under investigation. The underlying concept is demonstrated by second and third...
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