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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 46, Iss. 22 — Aug. 1, 2007
  • pp: 4959–4962

Simple scheme for ultraviolet time-pulse shaping

S. Cialdi, C. Vicario, M. Petrarca, and P. Musumeci  »View Author Affiliations

Applied Optics, Vol. 46, Issue 22, pp. 4959-4962 (2007)

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We present a method to generate high-energy flat-top UV laser pulses such as the ones needed to optimally drive high-brightness radio-frequency photoinjectors. In this scheme we believe to be novel, the longitudinal profile of a laser pulse from a Ti:sapphire master oscillator power amplifier system is controlled using a mechanical mask in the Fourier plane of a 4f stretcher located after the harmonic conversion crystals. Such a scheme allows us to overcome many of the difficulties faced by current state-of-the-art pulse-shaping designs. These are in fact based on various versions of preamplifier infrared shapers and hence suffer from the limitations set by the nonlinearities of chirped-pulse amplification and harmonic conversion. Beyond the clear advantages of simplicity and robustness, the proposed solution offers the possibility to deliver a pulse with very short rise and fall times and to freely change the output pulse length. We also note that, after proper calibration between spectral and temporal profiles, the shaper optical setup offers the possibility to retrieve the longitudinal profile of the laser pulse on a shot-to-shot basis.

© 2007 Optical Society of America

OCIS Codes
(260.7190) Physical optics : Ultraviolet
(320.5540) Ultrafast optics : Pulse shaping

ToC Category:
Ultrafast Optics

Original Manuscript: May 7, 2007
Revised Manuscript: May 15, 2007
Manuscript Accepted: May 15, 2007
Published: July 3, 2007

S. Cialdi, C. Vicario, M. Petrarca, and P. Musumeci, "Simple scheme for ultraviolet time-pulse shaping," Appl. Opt. 46, 4959-4962 (2007)

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  1. J. Yang, F. Sakai, T. Yanagida, M. Yorozu, Y. Okada, K. Takasago, A. Endo, A. Yada, and M. Washio, "Low-emittance electron-beam generation with laser pulse shaping in photocathode radio-frequency gun," J. Appl. Phys. 92, 1608-1612 (2002). [CrossRef]
  2. L. Palumbo and J. Rosenzweig, eds., Technical Design Report for the SPARC Advanced Photo-Injector (Laboratori Nazionali Frascati, Istituto Nazionale di Fisica Nucleare, 2004).
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  6. S. Cialdi, M. Petrarca, and C. Vicario, "High-power third-harmonic flat pulse laser generation," Opt. Lett. 31, 2885-2887 (2006). [CrossRef] [PubMed]
  7. M. Petrarca, C. Vicario, S. Cialdi, P. Mususmeci, G. Gatti, A. Ghigo, and M. Mattioli, "UV-IR cross correlator," Rep. INFN-SPARC/LS-06/002 (INFN-LNF, 2006), pp. 1-19.
  8. M. Boscolo, M. Ferrario, M. Migliorati, F. Castelli, S. Cialdi, and A. Flacco, "Preliminary results on beam dynamics of laser pulse shaping effects in SPARC," in Proceedings of the 2005 Particle Accelerator Conference (IEEE, 2005), p. 1315-1317.

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