Abstract
We present a setup to generate tightly focused Bessel beams that is composed of a half-ball lens coupled with a relay lens. The system is simple and compact compared to conventional imaging of axicons based on microscope objectives. We experimentally demonstrate the generation of a Bessel beam with a 42° cone angle at 980 nm in air with a typical beam length of $500\,\,{{\unicode{x00B5}{\rm m}}}$ and a central core radius of about 550 nm. We numerically studied the effects of the misalignment of the different optical elements and the range of tilt and shift that are acceptable to obtain a regular Bessel beam.
© 2023 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Pauline Boucher, Jesus Del Hoyo, Cyril Billet, Olivier Pinel, Guillaume Labroille, and François Courvoisier
Appl. Opt. 57(23) 6725-6728 (2018)
Jiu-Sheng Li, Jie Cheng, and Dong-Ping Zhang
Appl. Opt. 62(16) 4197-4202 (2023)
Sanjiv Kumar Tiwari, Satya Ram Mishra, Surjya Prakash Ram, and Haridarshan Singh Rawat
Appl. Opt. 51(17) 3718-3725 (2012)