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Applied Optics

Applied Optics


  • Vol. 42, Iss. 6 — Feb. 20, 2003
  • pp: 983–989

Comparison of adaptive optics and phase-conjugate mirrors for correction of aberrations in double-pass amplifiers

Steven Jackel, Inon Moshe, and Raphy Lavi  »View Author Affiliations

Applied Optics, Vol. 42, Issue 6, pp. 983-989 (2003)

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Correction of birefringence-induced effects (depolarization and bipolar focusing) were achieved in double-pass amplifiers by use of a Faraday rotator between the laser rod and the retroreflecting optic. A necessary condition was ray retrace. Retrace was limited by imperfect conjugate-beam fidelity and by nonreciprocal refractive indices. We compared various retroreflectors: stimulated-Brillouin-scatter phase-conjugate mirrors (PCMs), PCMs with rod-to-PCM relay imaging (IPCM), IPCMs with astigmatism-correcting adaptive optics, and all-adaptive-optics imaging variable-radius mirrors. Results with flash-lamp-pumped, Nd:Cr:GSGG double-pass amplifiers showed the superiority of adaptive optics over nonlinear optics retroreflectors in terms of maximum average power, improved beam quality, and broader oscillator pulse duration/bandwidth operating range. Hybrid PCM-adaptive optics retroreflectors yielded intermediate power/beam-quality results.

© 2003 Optical Society of America

OCIS Codes
(010.1080) Atmospheric and oceanic optics : Active or adaptive optics
(140.6810) Lasers and laser optics : Thermal effects
(190.5040) Nonlinear optics : Phase conjugation

Original Manuscript: July 14, 2002
Revised Manuscript: October 7, 2002
Published: February 20, 2003

Steven Jackel, Inon Moshe, and Raphy Lavi, "Comparison of adaptive optics and phase-conjugate mirrors for correction of aberrations in double-pass amplifiers," Appl. Opt. 42, 983-989 (2003)

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