Share Email Print
cover

Proceedings Paper

Focal spot of femtosecond laser pulse under tight focusing condition
Author(s): Tae Moon Jeong; Stefan Weber; Bruno Le Garrec; Daniele Margarone; Tomas Mocek; Georg Korn
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A tight focusing scheme using a low f-number focusing optic is frequently considered as an effort to efficiently increase a peak intensity of a high power laser. In this paper, we present a method for describing the focal spot of a femtosecond laser pulse which is formed in the spatio-temporal region under low f-number (f-number ≤ 1) focusing conditions. In the method, transverse and longitudinal electromagnetic (EM) fields for a monochromatic wave are calculated in the focal plane and its vicinity, and then, in order to precisely describe the femtosecond focal spot in the spatio-temporal domain, the calculated monochromatic EM fields are coherently superposed with a given amount of spectral bandwidth and phase. The accuracy and validity of the method are tested and compared to results obtained with Fourier transform method under high f-number conditions. The single electron trajectory under a strong longitudinal field formed by a low f-number optic is presented to emphasize the importance of the tight focusing scheme.

Paper Details

Date Published: 1 May 2015
PDF: 6 pages
Proc. SPIE 9515, Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers II, 95150I (1 May 2015); doi: 10.1117/12.2179369
Show Author Affiliations
Tae Moon Jeong, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Gwangju Institute of Science and Technology (Korea, Republic of)
Stefan Weber, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Bruno Le Garrec, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Daniele Margarone, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Tomas Mocek, Institute of Physics of the ASCR, v.v.i. (Czech Republic)
Georg Korn, Institute of Physics of the ASCR, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 9515:
Research Using Extreme Light: Entering New Frontiers with Petawatt-Class Lasers II
Georg Korn; Luis O. Silva, Editor(s)

© SPIE. Terms of Use
Back to Top