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Chin. Phys. B, 2017, Vol. 26(7): 074201    DOI: 10.1088/1674-1056/26/7/074201
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

Laser beam shaping with magnetic fluid-based liquid deformable mirrors

Zhi-Zheng Wu(吴智政), Zhu Zhang(张柱), Xiang-Hui Kong(孔祥会), Jun-Qiu Wu(吴君秋), Tao Wang(王韬), Mei Liu(刘梅), Shao-Rong Xie(谢少荣)
Department of Precision Mechanical Engineering, Shanghai University, Shanghai 200072, China
Abstract  A new controllable laser beam shaping technique is demonstrated, where a magnetic fluid-based liquid deformable mirror is proposed to redistribute the laser phase profile and thus change the propagation property of the beam. The mirror is driven by an inner miniature actuator array along with a large outer actuator. The inner actuator array is used for deforming the magnetic fluid surface, while the outer actuator is used to linearize the fluid surface response and amplify the magnitude of the deflection. In comparison to other laser beam shaping techniques, this technique offers the advantages such as simplicity, low cost, large shape deformation, and high adaptability. Based on a fabricated prototype of the liquid deformable mirror, an experimental AO system was set up to produce a desired conical surface shape that shaped the incident beam into a Bessel beam. The experimental results show the effectiveness of the proposed technique for laser beam shaping.
Keywords:  laser beam shaping      magnetic fluid      deformable mirror      Bessel beam  
Received:  10 November 2016      Revised:  23 February 2017      Accepted manuscript online: 
PACS:  42.15.Dp (Wave fronts and ray tracing)  
  47.65.Cb (Magnetic fluids and ferrofluids)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No.51675321),Shanghai Municipal Natural Science Foundation,China (Grant No.15ZR1415800),and the Innovation Program of Shanghai Municipal Education Commission,China (Grant No.14ZZ092).
Corresponding Authors:  Zhi-Zheng Wu     E-mail:  zhizhengwu@shu.edu.cn

Cite this article: 

Zhi-Zheng Wu(吴智政), Zhu Zhang(张柱), Xiang-Hui Kong(孔祥会), Jun-Qiu Wu(吴君秋), Tao Wang(王韬), Mei Liu(刘梅), Shao-Rong Xie(谢少荣) Laser beam shaping with magnetic fluid-based liquid deformable mirrors 2017 Chin. Phys. B 26 074201

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