Acta Optica Sinica, Volume. 32, Issue 7, 726001(2012)
Theory and Experiment of Bessel Beam Generated by Thermal Light Source
Bessel-like beam is generated by using thermal light source. The incident condition for the light waves with multi-wavelength passing through axicon simultaneously is analyzed and simulated. The results show that Bessel beam can be generated behind the axicon, but the contrast of the cross section light intensity drops because of the incoherent superposition of the multi-wavelength light waves. In our experiment, halogen light cup is used as thermal light source for generating Bessel beam. A set of optical system is designed to improve the spatial coherence of the light waves, and the Bessel-like beam is generated after the light waves passing the axicon. Comparing the experimental result with the numerical simulation, it is found that Bessel beam obtained from experiment is basically in accord with the numerical calculation. Besides the maximum diffraction-free distance is shorter in the experiment, which is analyzed at the end of the paper.
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Cheng Zhiming, Wu Fengtie, Zheng Weitao, Zhang Qian′an, Fan Dandan. Theory and Experiment of Bessel Beam Generated by Thermal Light Source[J]. Acta Optica Sinica, 2012, 32(7): 726001
Category: Physical Optics
Received: Dec. 30, 2011
Accepted: --
Published Online: May. 24, 2012
The Author Email: Zhiming Cheng (tkgg_8795@sina.com)