Recently, Prof. Limin Xiao's research group has made breakthrough in the field of all-fiber devices. The related research paper “The Bessel-like beams generated via fiber-based polymer microtips”, has been published in Optics Letters. Laser Focus World magazine, the premiere international resource for technology and applications in the global photonics industry, has reported this work in the Newsbreaks column.

With their non-diffracting and self-healing properties, Bessel-like beams find use in particle guiding, imaging, microfabrication and other applications. Xiao’s group has developed a novel and efficient approach to generating Bessel-like beams by fabricating self-growing polymer microtips at the facet of single-mode fibers.

To produce these beams, the length and shape of microtips were precisely optimized. Specifically, the convex droplet height and its photopolymerization parameters feature prominently in Bessel-like beams via microtips. This microtip functions over broad bandwidth with the maximum of more than 30 concentric rings, and the self-healing property of Bessel-like beams is verified. The method promises an effective, low-cost, convenient, and ultra-compact method for generation of Bessel-like beams.

Senior Editor John Wallace of Laser Focus World magazine said: “Previous fiber-based microaxicons produced Bessel-like beams with only several concentric rings (less than five, and with low quality), and other fiber-based methods produce the beams either with low quality or with narrow wavelength range. Now, researchers at Fudan University (Shanghai, China) have developed a novel and efficient approach to generating Bessel-like beams by fabricating self-growing polymer microtips at the facet of single-mode fibers. The method promises an effective, low-cost, convenient, and ultracompact method for generation of Bessel-like beams.”

The research work was funded by National Natural Science Foundation of China (grants 61475119 and 61775041); The Shanghai Pujiang Program (17PJ1400600); The National Key R&D Program of China (2016YFC0201401)

The link to the Optics Letters journal article is:

https://doi.org/10.1364/OL.44.001007

The link to《Laser Focus World》website is:

https://www.laserfocusworld.com/articles/print/volume-55/issue-03/newsbreaks/fiber-based-polymer-microtips-produce-bessel-like-beams.html