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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 51, Iss. 15 — May. 20, 2012
  • pp: 2941–2950

Phase control requirements of high intensity laser beam combining

Yan-Qi Gao, Wei-xin Ma, Bao-Qiang Zhu, Dai-zhong Liu, Zhao-dong Cao, Jian Zhu, and Ya-ping Dai  »View Author Affiliations


Applied Optics, Vol. 51, Issue 15, pp. 2941-2950 (2012)
http://dx.doi.org/10.1364/AO.51.002941


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Abstract

Aiming at getting the general requirements of the beam combine for ignition scale laser facilities, the analytical expressions including the factors affecting the combine results are derived. The physical meanings of every part are illustrated. Based on these expressions, the effects of the factors, including the beam configuration, piston error, and tip/tilt error, are studied analytically and numerically. The results show that the beam configuration cannot affect the Strehl ratio (SR) of the combined beam, but it influences the FWHM of the main peak and the ratio of the main peak and the side peak. The beam separation should be no more than 1.24 times the individual beam width for the multibeam combine, and be close to the individual beam width for the two-beam combine as much as possible. The piston error can change the characteristics of the combine beam focus, including the peak intensity, the focal spot morphology, the fractional energy contained within a certain area, and the center of mass. For the two-beam combine, a piston error less than 2π/5rad is suitable, and for the multibeam combine, the standard deviation of the piston error should be no more than 2π/10rad. The tip/tilt error has a great influence on the combined results. It affects the superposition degree of the focal spots of the combined elements directly. A requirement of 0.51μrad for the standard deviation of the tip/tilt error is adequate.

© 2012 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(140.3290) Lasers and laser optics : Laser arrays
(140.3460) Lasers and laser optics : Lasers
(140.3298) Lasers and laser optics : Laser beam combining

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 13, 2011
Revised Manuscript: March 19, 2012
Manuscript Accepted: March 19, 2012
Published: May 16, 2012

Citation
Yan-Qi Gao, Wei-xin Ma, Bao-Qiang Zhu, Dai-zhong Liu, Zhao-dong Cao, Jian Zhu, and Ya-ping Dai, "Phase control requirements of high intensity laser beam combining," Appl. Opt. 51, 2941-2950 (2012)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-51-15-2941

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