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Proceedings Paper

Miniature pulse compressor with double-line-density gratings
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Paper Abstract

Femtosecond laser technology is one of the frontiers in the fields of nonlinear optics, advanced manufacturing etc. The method of femtosecond pulse compression is an important research content. To compress the femtosecond pulse, we need to use negative dispersive elements to compensate the positive dispersion of Ti: sapphire crystal and other optical elements. For this purpose, we propose a miniature double-line-density grating pair in which the line density of the second grating is twice of the first one, the output pulse propagates along the way back. The density of the gratings is high, which will have a high diffraction efficiency and can compensate a high GVD ( group velocity dispersion ) in a small distance. The first grating is transmitted and the second one is reflective, the device will not occlude the beam propagation. With the pair of the gratings, the input positive chirped 89fs pulse is neatly compressed into the Fourier transform limited 44fs pulse with no spectral spatial walkoff and dispersion. It can be used for compression in laser cavity or out of the cavity. The gratings are easy to adjust and the structure is simple and compact, which has widespread interest in practical applications.

Paper Details

Date Published: 11 November 2014
PDF: 6 pages
Proc. SPIE 9271, Holography, Diffractive Optics, and Applications VI, 92711H (11 November 2014); doi: 10.1117/12.2071306
Show Author Affiliations
Yanyang Li, Shanghai Univ. (China)
Wei Jia, Shanghai Institute of Optics and Fine Mechanics (China)
Changhe Zhou, Shanghai Institute of Optics and Fine Mechanics (China)
Xiaona Yan, Shanghai Univ. (China)
Shubin Li, Shanghai Institute of Optics and Fine Mechanics (China)
Jin Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Kun Liu, Shanghai Institute of Optics and Fine Mechanics (China)
Yancong Lu, Shanghai Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 9271:
Holography, Diffractive Optics, and Applications VI
Yunlong Sheng; Chongxiu Yu; Changhe Zhou, Editor(s)

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