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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 11 — Jun. 1, 2010
  • pp: 1783–1785

Pulse compression and beam focusing with segmented diffraction gratings in a high-power chirped-pulse amplification glass laser system

Hideaki Habara, Guang Xu, Takahisa Jitsuno, Ryosuke Kodama, Kenji Suzuki, Kiyonobu Sawai, Kiminori Kondo, Noriaki Miyanaga, Kazuo A. Tanaka, Kunioki Mima, Michael C. Rushford, Jerald A. Britten, and Christopher P. J. Barty  »View Author Affiliations


Optics Letters, Vol. 35, Issue 11, pp. 1783-1785 (2010)
http://dx.doi.org/10.1364/OL.35.001783


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Abstract

Segmented (tiled) grating arrays are being intensively investigated for petawatt-scale pulse compression due to the expense and technical challenges of fabricating monolithic diffraction gratings with apertures of over 1 m . However, the considerable freedom of motion among grating segments complicates compression and laser focusing. We constructed a real compressor system using a segmented grating for an 18 cm aperture laser beam of the Gekko MII 100 TW laser system at Osaka University. To produce clean pulse shapes and single focal spots tolerant of misalignment and groove density difference of grating tiles, we applied a new compressor scheme with image rotation in which each beam segment samples each grating segment but from opposite sides. In high-energy shots of up to 50 J , we demonstrated nearly Fourier-transform-limited pulse compression ( 0.5 ps ) with an almost diffraction-limited spot size ( 20 μm ).

© 2010 Optical Society of America

OCIS Codes
(050.0050) Diffraction and gratings : Diffraction and gratings
(140.0140) Lasers and laser optics : Lasers and laser optics

ToC Category:
Diffraction and Gratings

History
Original Manuscript: January 20, 2010
Revised Manuscript: March 30, 2010
Manuscript Accepted: March 31, 2010
Published: May 19, 2010

Citation
Hideaki Habara, Guang Xu, Takahisa Jitsuno, Ryosuke Kodama, Kenji Suzuki, Kiyonobu Sawai, Kiminori Kondo, Noriaki Miyanaga, Kazuo A. Tanaka, Kunioki Mima, Michael C. Rushford, Jerald A. Britten, and Christopher P. J. Barty, "Pulse compression and beam focusing with segmented diffraction gratings in a high-power chirped-pulse amplification glass laser system," Opt. Lett. 35, 1783-1785 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-11-1783


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References

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