Phys.org October 3, 2022
Researchers in Israel have shown that by using 3D-direct laser writing, high-quality optical devices could be fabricated directly on top of the fiber’s facet by the two-photon absorption process. They demonstrated how a high-order Bessel beam carrying orbital angular momentum could be generated by using this lithography process. The beam is shaped using an integrated micro-optical system that consists of a twisted axicon and parabolic lens in an adapted fiber configuration. They provided the analysis and measurements of the generated beam, along with simulated predictions. They found that the size of the central ring remained nearly unchanged at 2 mm from the fiber in the far-field pattern. According to the researchers their work may pave the way for future integrated beam manipulation on fibers, enabling the use of higher laser outputs and provide an extremely compact and inexpensive way to tailor light beams for a variety of applications…read more. TECHNICAL ARTICLEÂ
The researchers created an optical measuring system to analyze the performance of beams shaped by the fabricated device…Credit: Shlomi Lightman, Soreq Nuclear Research Center