caa a22 4500 44537098X CHVBK 20180317142946.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s00340-011-4674-1 doi (NATIONALLICENCE)springer-10.1007/s00340-011-4674-1 Near-diffraction-limited dark hollow beam generated by using a hybrid control way [Elektronische Daten] [H. Ma, Z. Liu, F. Xi, X. Xu] We propose and demonstrate the generation of dark hollow beam with plane wavefront in the near field based on a hybrid control way by using dual phase only liquid crystal spatial light modulators (LC-SLMs). One phase only LC-SLM redistributes the intensity to the target distribution based on refractive beam shaping system and the other phase only LC-SLM adaptively compensates the wavefront of the output beam by using stochastic parallel gradient descent (SPGD) algorithm. Compared with conventional refractive beam shaping system, the hybrid control way can not only improve the far-field energy concentration of the output beam, but also can correct the phase distortion of the system. Influences of phase distortion on laser beam shaping are analyzed in detail. The theoretical and experimental results show that the near-diffraction-limited dark hollow beam can be successfully generated by using this hybrid control way. The power in the main lobe of the airy disk pattern area in the far field is 2.3 times larger than that without being adaptively compensated. Springer-Verlag, 2011 Ma H. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut Liu Z. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut Xi F. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut Xu X. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut Applied Physics B Springer-Verlag 105/4(2011-12-01), 883-891 0946-2171 105:4<883 2011 105 340 https://doi.org/10.1007/s00340-011-4674-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00340-011-4674-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ma H. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Liu Z. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Xi F. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut NATIONALLICENCE 700 1- Xu X. College of Opto-Electronic Science and Engineering, National University of Defense Technology, 410073, Changsha, Hunan, China aut NATIONALLICENCE 773 0- Applied Physics B Springer-Verlag 105/4(2011-12-01), 883-891 0946-2171 105:4<883 2011 105 340 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer