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Propagation Properties of Femtosecond Pulsed Beams in Dispersive

Author: ZhengZhen
Tutor: LvBaiDa
School: Sichuan University
Course: Optics
Keywords: Ultrashort pulse technology Pulse Gaussian beam Dispersive medium Spatial and temporal characteristics
CLC: TN249
Type: Master's thesis
Year: 2006
Downloads: 194
Quote: 0
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Abstract


With the rapid development of ultrashort pulse laser technology , the lab has been able to output from the far-infrared (FIR) to the extreme ultraviolet ( XUV ) , even the X-ray band ultrashort pulse , the pulse width from a few femtoseconds to hundreds of A seconds, corresponding to several light cycle or even a light cycle . Ultrashort pulsed beams in free space , the propagation and transformation of the dispersive medium and optical system caused by a wide range of research interests . The papers only for in-depth study of the transmission characteristics of femtosecond pulsed beams in dispersive media . Innovative work include : 1 , starting from the Rayleigh - Sommerfeld the Philippine diffraction integral formula , no paraxial approximation premise , drawn far-field beam width pulse Gaussian beam in a dispersive medium formula . The analysis , based on the formula in the far-field beam width pulse Gaussian beam in a dispersive medium chirp given a new definition of normalized local time , and pulse time move made ​​research . The deduced beam width pulse Gaussian beam spectrum mobile formula , the spectrum displacement law . 4, raised no implied conditions exist in the beam transmission k> 0 , we obtain the Gaussian beam diffraction pulse in a dispersive medium non - beam behavior \Gaussian beam diffraction pulse 5 Gaussian pulse , for example , a summary of the characteristics of the normal and anomalous dispersion medium . The obtained Gaussian beam diffraction pulse in a dispersive medium radius of curvature correction formula is the radius of curvature of the anomalous dispersion medium wavefront surfaces , made a detailed analysis . And analysis of pulsed beams in dispersive media generated chirp .

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