Abstract
This Letter presents, to our knowledge, the first direct measurement of the three-dimensional distribution of photonic jets (PJs) generated by shaped-tip multimode optical fibers. A PJ at the distal end of optical fibers makes it easier to scan a sample, for lithography or optical analysis, for example, with a spot smaller than the diffraction limit. The backscattered light can also be easily collected. In this study, the volume of the PJ has been reconstructed using a stack of image planes and compared to numerical simulations. For the first time, the power distribution of the non-fundamental mode around the PJ has been observed, giving a better understanding of PJ-based laser etching using multimode optical fibers. An original 50/125 fiber with a microlens fitting just on its core has made it possible to strongly reduce the power spread compared to the thermoformed 100/140 fibers used in our previous works.
© 2021 Optical Society of America
Full Article | PDF ArticleMore Like This
Julien Zelgowski, Andri Abdurrochman, Frederic Mermet, Pierre Pfeiffer, Joël Fontaine, and Sylvain Lecler
Opt. Lett. 41(9) 2073-2076 (2016)
Robin Pierron, Julien Zelgowski, Pierre Pfeiffer, Joël Fontaine, and Sylvain Lecler
Opt. Lett. 42(14) 2707-2709 (2017)
Daniel Cruz-Delgado, Juan Carlos Alvarado-Zacarias, Matthew A. Cooper, Steffen Wittek, Caleb Dobias, Julian Martinez-Mercado, Jose E. Antonio-Lopez, Nicolas K. Fontaine, and Rodrigo Amezcua-Correa
Opt. Lett. 46(13) 3292-3295 (2021)