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Proceedings Paper

Ray-tracing model for the stretching calculation of the new type of aberration-free stretcher
Author(s): Shenghong Huang; Jintao Bai; Xun Hou
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Paper Abstract

Chirped pulse amplification(CPA) has become a common technique for the generation of ultrashort and high peak power femtosecond(fs) optical pulses. One key point of this technique is the reasonable design for the pulse stretcher. We improved the aberration—free stretcher replacing the two spherical mirrors with two concentric rectangular focused cylindrical ones. The first mirror is convex, and the second one concave. Their radius of curvature ratio is two and of opposite sign. This combination cancels spherical aberration and astigmatism, and has no on-axis coma and exhibits no chromatic aberration. We calculated the group velocity dispersion(GVD) of the stretcher by ray-tracing model. Supposing that the distance between the grating and the center of curvature is a variable 1, we obtained the variety of the group delay and the GVD of the stretcher with the parameter 1 and the incidence wavelength A .For the input pulse, let pulsewidth to 9.8fs , the initial chirp C=O.75, the distance l=O.lm, we gained GVD was 2.5fs2/jm for the center wavelength 790nm, the stretching factor was 90197.4, that is, the seed pulse(9.8fs in duration) can be stretched to 884 PS

Paper Details

Date Published: 5 September 2002
PDF: 7 pages
Proc. SPIE 4914, High-Power Lasers and Applications II, (5 September 2002); doi: 10.1117/12.481815
Show Author Affiliations
Shenghong Huang, Northwest Univ. (China)
Jintao Bai, Northwest Univ. (China)
Xun Hou, Xi'an Institute of Optics and Precision Mechanics (China)

Published in SPIE Proceedings Vol. 4914:
High-Power Lasers and Applications II
Dianyuan Fan; Keith A. Truesdell; Koji Yasui, Editor(s)

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