Temporal fine structure of all-normal dispersion fiber supercontinuum

Experimental characterization of spectro-temporal structure of octave-spanning, coherent fiber supercontinuum pulses is performed and full-field information is retrieved using time-domain ptychography. Fast femtosecond oscillations are observed and traced back to imperfections of the pump pulses

Percutaneous aspiration of a right atrial thrombus with the AngioVac system

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Low pump power coherent supercontinuum generation in heavy metal oxide solid-core photonic crystal fiber infiltrated with carbon tetrachloride covering 930 – 2500 nm

All-normal dispersion supercontinuum (ANDi SC) generation in a lead-bismuth- gallate glass solid-core photonic crystal fiber (PCF) with cladding air-holes infiltrated with carbon tetrachloride (CCl4) is experimentally investigated and numerically verified. The liquid infiltration results in additional degrees of freedom that are complimentary to conventional dispersion engineering techniques and that allow the design of soft-glass ANDi fibers with an exceptionally flat near-zero dispersion profile. The unique combination of high nonlinearity and low normal dispersion enables the generation of a coherent, low-noise SC covering 0.93–2.5 μm requiring only 12.5 kW of pump peak power delivered by a standard ultrafast erbium-fiber laser with 100 MHz pulse repetition rate (PRR). This is a much lower peak power level than has been previously required for the generation of ANDi SC with bandwidths exceeding one octave in silica- or soft-glass fibers. Our results show that liquid-composite fibers are a promising pathway for scaling the PRR of ANDi SC sources by making the concept accessible to pump lasers with hundreds of megahertz of gigahertz PRR that have limited peak power per pulse but are often required in applications such as high-speed nonlinear imaging, optical communications, or frequency metrology. Furthermore, due to the overlap of the SC with the major gain bands of many rare-earth fiber amplifiers, our source could serve as a coherent seed for low-noise ultrafast lasers operating in the short-wave infrared spectral region

GRAVITA' E TETTONICA NELLE MARCHE E NEGLI ABRUZZI SETTENTRIONALI

Nella 52° Sessione della Commissione Geodetica<br />Italiana tenuta a Padova il 27 febbraio 1954, allorché venne fatto il<br />consuntivo dello stato attuale del rilievo gravimetrico di 1° ordine in<br />Italia, risultò ancora non rilevata la regione fra l'Emilia (rilievo dell'Istituto<br />di Geodesia dell'Università di Bologna), la Toscana (Istituto<br />Geografico Militare) e la congiungente Roma-Pescara (limite Nord<br />del rilievo del Servizio Geologico d'Italia)

Observation of Visible Upconversion Luminescence of Soft Glass Multimode Fibers

This research investigates the visible upconversion luminescence which is induced by multiphoton absorption of soft glass fiber defects. The study of this phenomenon has thus far been restricted to standard silica fibers. We observed the emission of green and cyan light as a consequence of fiber material ionization. We investigate both the commercial ZBLAN step index and in-house-made tellurite nanostructured graded-index fibers. For the latter, the analysis of the luminescence signal permits us to determine the core and cladding refractive index difference. Upconversion luminescence is a powerful tool for characterizing soft glass fibers and a promising platform for innovative photonic technologies and mid-IR applications