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Institute Colloquium


Prof. Axel Schülzgen


High-power laser delivery through anti-resonant hollow core fiber

May 2, 2024

Start: 1:30 pm

Conference Room at Leibniz IPHT


Contact persons at Leibniz IPHT: Matthias Jäger

Axel Schülzgen received his PhD in Physics from Humboldt-University of Berlin, Germany. Since 2009 he is Professor of Optics at CREOL, University of Central Florida. He also holds an Adjunct Research Professor position at the College of Optical Sciences, University of Arizona. His research interests include optical fiber devices, components, materials, and structures with applications in fiber laser systems, fiber optic sensing, and optical communications. Professor Schulzgen is a Fellow of the Optical Society of America and a member of the International Society for Optics and Photonics SPIE and the German Physical Society.

Recent developments of anti-resonant hollow core fibers (AR-HCF) have provided unique opportunities in many areas of fiber optics. In particular, the delivery of high-power single-mode laser beams through AR-HCFs has undergone substantial advancements. These developments have been driven by the potential application of this technology in key areas such as telecommunications, directed energy, and power-beaming over fiber to mention a few. AR-HCF can be utilized to transfer high power light sources while preserving the characteristic features of the source and without suffering detrimental nonlinear effects.

As a prominent example, we show the delivery of high-power continuous laser light with narrow linewidth around a wavelength of 1 micron.  We demonstrate the transmission of over 2 kW of optical power through 100 m AR-HCF, maintaining 95% efficiency and diffraction-limited beam quality. For linewidth from 38 GHz to 86 GHz a total suppression of stimulated Brillouin scattering is observed.

The lecture will be given in English.