Fig. 1. Schematic diagram of Bessel wave vector and axial cone angle

Fig. 2. Generation of the Bessel beam by SLM in the direct space. (a) Experimental setup; (b) simulated evolution of the non-diffracting Bessel beam along propagation in the Bessel zone; (c) phase mask loaded on SLM panel

Fig. 3. (a) Experimental and (b) numerical data of the intensity distribution along the propagation axis of Bessel beams

Fig. 4. FWHM evolution of the central lobe along propagation with the same initial size (B=289.85) and different slope rates A1=0.0926 mm-1, A2=0.144 mm-1, A3=0.215 mm-1. (a) Experimental and theoretical results; (b) numerical simulation and theoretical results

Fig. 5. Transverse intensity profiles at the location of the peak intensity with fixed initial lobe size (B=289.85) and different slope rates. (a) A1=0.0926 mm-1; (b) A2=0.144 mm-1; (c) A3=0.215 mm-1

Fig. 6. FWHM evolutions of the central lobe along propagation with the same slope rate (A=0.0926 mm-1) and different initial lobe sizes (B1=289.85, B2=414.07, B3=579.71). (a) Experimental and theoretical results; (b) numerical simulation and theoretical results

Fig. 7. Transverse intensity profiles at the location of the peak intensity with fixed slope rate (A=0.926 mm-1) and different initial lobe sizes. (a) B3=579.71; (b) B2=414.07; (c) B1=289.85