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
- 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
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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