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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 27 — Sep. 20, 2005
  • pp: 5818–5823

Spatial beam shaping of ultrashort laser pulses: theory and experiment

Shuyan Zhang, Qiguang Yang, and Gunter Lüpke  »View Author Affiliations


Applied Optics, Vol. 44, Issue 27, pp. 5818-5823 (2005)
http://dx.doi.org/10.1364/AO.44.005818


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Abstract

We studied the spatial intensity profile of an ultrashort laser pulse passing through a laser beam shaping system, which uses diffractive optical elements to reshape a Gaussian beam profile into a flat-topped distribution. Both dispersion and nonlinear self-phase modulation are included in the theoretical model. Our calculation shows that this system works well for ultrashort pulses (∼100 fs) when the pulse peak intensity is less than 5×10¹¹ W/cm². Experimental results are presented for 136 fs pulses at 800 nm wavelength from a Ti:sapphire laser with a 6 nJ pulse energy. We also studied the effects of lateral misalignment, beam-size deviation, and defocusing on the energy fluence profile.

© 2005 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(320.5550) Ultrafast optics : Pulses

Citation
Shuyan Zhang, Qiguang Yang, and Gunter Lüpke, "Spatial beam shaping of ultrashort laser pulses: theory and experiment," Appl. Opt. 44, 5818-5823 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-27-5818


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