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Coherent beam combining of cylindrical vector beams for power scaling

Shixin Liu, Hang Liu, Xuepeng Qi, Wanjing Peng, Yujun Feng, Li Chen, Zhendong Li, Yinhong Sun, Yi Ma, Zhigang Zhao, Qingsong Gao, Zhaojun Liu, and Chun Tang

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Abstract

Coherent beam combining (CBC) of cylindrical vector beams (CVBs) based on an active phase controller is proposed and demonstrated. Experimentally, two pieces of spatially variant wave plates (S-wave plate) were employed as vector mode convertors for two individual 1064-nm fiber amplifier channels. When the system was in a closed loop, a combined output power of 10 W and a CBC efficiency of higher than 94% were achieved, for both TM01 (radially polarized) mode and TE01 (azimuthally polarized) mode cases. Moreover, the laser system showed a high vector mode purity, which was measured to be ∼97.4% (TM01) and ∼97.3% (TE01). To the best of knowledge, this could possibly be the first demonstration of CBC of CVBs, which paves the way for power scaling of CVBs.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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