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  • Received: Sep. 9, 2019

    Accepted: Oct. 16, 2019

    Posted: Dec. 23, 2019

    Published Online: Feb. 10, 2020

    The Author Email: Wenguang Liu (lwg.kevin@163.com)

    DOI: 10.3788/COL202018.011404

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    Kun Xie, Wenguang Liu, Qiong Zhou, Zongfu Jiang, Fengjie Xi, Xiaojun Xu. Real-time phase measurement and correction of dynamic multimode beam using a single spatial light modulator[J]. Chinese Optics Letters, 2020, 18(1): 011404

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Chinese Optics Letters, Vol. 18, Issue 1, 011404 (2020)

Real-time phase measurement and correction of dynamic multimode beam using a single spatial light modulator

Kun Xie1,2,3, Wenguang Liu1,2,3,*, Qiong Zhou1,2,3, Zongfu Jiang1,2,3, Fengjie Xi1,2,3, and Xiaojun Xu1,2,3

Author Affiliations

  • 1College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha 410073, China
  • 2State Key Laboratory of Pulsed Power Laser Technology, Changsha 410073, China
  • 3Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha 410073, China

Abstract

In this Letter, a novel system for adaptively correcting the phase of a dynamic multimode beam is proposed. While using merely one spatial light modulator, the phase measurement of the first-order diffraction pattern and the correction of the zeroth diffraction order are simultaneously realized. The real-time experimental result is obtained at a control rate of 10 Hz. The power-in-the-bucket value is improved from 38.5% to 61.8%, even with fundamental mode content that is consistently below 30%. To the best of our knowledge, this is the first implementation of real-time adaptive correction of the entire multimode beam.

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