Overview
ABSTRACT
This article presents the fundamental physics of the propagation of pulsed beams of light within an absorber material and a dispersive nonlinear material. First, we show Q-switching methods to create short pulses within nanosecond (1 ns = 10?9 s) and picosecond (1 ps = 10?12 s) time ranges. For ultrashort femtosecond (1 fs = 10?15 s) laser pulses obtained from self-focusing or Kerr lens and self-phase modulation, we look at novelty applications and give perspectives for very high intensity electromagnetic fields for petawatt (1015 watts/cm2) laser sources.
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Read the articleAUTHOR
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Georges BOULON : University Professor - Institut Lumière Matière, CNRS 5306 Joint Research Unit - Université Claude Bernard Lyon1, University of Lyon, Lyon, France
INTRODUCTION
This article on the generation of short (ns) to ultrashort laser pulses down to the femtosecond (fs) is associated with the three articles on solid-state laser sources: foundations
The aim is to demonstrate the need for laser sources with ever shorter pulses, and to describe the various physical methods, especially optical, required for their production, while giving the main physical parameters for characterization.
After defining the vocabulary of the basic notions of light pulse propagation, we detail the triggering methods used to generate short pulses on the nanosecond and picosecond scales, then ultrashort pulses on the femtosecond scale, along with some original applications and perspectives.
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KEYWORDS
pulsed light propagation | Kerr effect | self-focalisation | pulsed laser | mode-locking
CAN BE ALSO FOUND IN:
Ultra-Short Pulsed Laser Generation Up to Femtosecond
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