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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 47, Iss. 27 — Sep. 20, 2008
  • pp: 4959–4964

Littrow angle method to remove alignment errors in grating pulse compressors

M. J. Guardalben  »View Author Affiliations


Applied Optics, Vol. 47, Issue 27, pp. 4959-4964 (2008)
http://dx.doi.org/10.1364/AO.47.004959


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Abstract

An alignment method for pulse-compression gratings that obviates the need to place the gratings at normal incidence to remove grating-tip error is proposed. Grating-tip and groove-orientation errors are removed using two alignment wavelengths in a manner analogous to a laser-beam pointing and centering procedure entirely at the respective Littrow angles for the two wavelengths. By choosing wavelengths with Littrow angles close to the use angle of the grating, the residual tip and groove-orientation errors that may be introduced when the grating mount is tilted to its use angle are reduced. This method has greatly facilitated the alignment of the OMEGA Extended Performance (EP) large-aperture pulse compressors, thereby reducing residual pulse-front tilt caused by nonparallel gratings. OMEGA EP is a high-energy, petawatt-class laser at the University of Rochester’s Laboratory for Laser Energetics. A numerical simulation of the alignment procedure is presented.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(140.7090) Lasers and laser optics : Ultrafast lasers
(320.5520) Ultrafast optics : Pulse compression
(350.2660) Other areas of optics : Fusion

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 26, 2008
Manuscript Accepted: August 2, 2008
Published: September 17, 2008

Citation
M. J. Guardalben, "Littrow angle method to remove alignment errors in grating pulse compressors," Appl. Opt. 47, 4959-4964 (2008)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-47-27-4959

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