Dispersion managed mode-locking dynamics in a Ti:Sapphire laser

We present what is to our knowledge the most complete 1-D numerical analysis of the evolution and the propagation dynamics of an ultrashort laser pulse in a Ti:Sapphire laser oscillator. This study confirms the dispersion managed model of mode-locking, and emphasizes the role of the Kerr nonlinearity in generating mode-locked spectra with a smooth and well-behaved spectral phase. A very good agreement with preliminary experimental measurements is found.Comment: 11 pages, 4 figures, submitted to Optics Letter

Sub two-cycle soliton-effect pulse compression at 800 nm in Photonic Crystal Fibers

The possibility of soliton self-compression of ultrashort laser pulses down to the few-cycle regime in photonic crystal fibers is numerically investigated. We show that efficient sub-two-cycle temporal compression of nanojoule-level 800 nm pulses can be achieved by employing short (typically 5-mm-long) commercially available photonic crystal fibers and pulse durations of around 100 fs, regardless of initial linear chirp, and without the need of additional dispersion compensation techniques. We envisage applications in a new generation of compact and efficient sub-two cycle laser pulse sources.Comment: 16 pages, 6 figure

Optical delay control of large-spectral-bandwidth laser pulses

In this letter we report the first experimental observation of temporal delay control of large-spectral-bandwidth multimode laser pulses by means of electromagnetically induced transparency (EIT). We achieved controllable retardation with limited temporal distortion of optical pulses with an input spectral bandwidth of 3.3 GHz. The experimental results compare favorably with theoretical predictions.Comment: Submitted to Optics Letters (January 2009

La salute per tutti. Un’indagine sulle origini della sociologia della salute in Italia

Il volume presenta i risultati di una ricerca sulla nascita della riflessione sociologica sulla salute in Italia. L’indagine si concentra soprattutto sul periodo che va dall’inizio degli anni ’70 ai primi anni ’90. La ricerca evidenzia la pluralità di voci, prospettive e aree di sviluppo che hanno segnato la sociologia sanitaria, della salute e della medicina nel nostro paese: essa infatti indaga varie aree locali entro cui gruppi di sociologi, ma anche di medici, psichiatri, igienisti e altri professionisti sanitari, hanno operato nel corso di oltre un quarto di secolo mettendo le basi della riflessione e ricerca scientifica successive. Inoltre esso presenta gli autori più significativi del periodo corredati da un'antologia degli scritti più significativi