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Proceedings Paper

Specialty flat-top beam delivery fibers with controlled beam parameter product
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Paper Abstract

Beam delivery fibers have been used widely for transporting the optical beams from the laser to the subject of irradiation in a variety of markets including industrial, medical and defense applications. Standard beam delivery fibers range from 50 to 1500 μm core diameter and are used to guide CW or pulsed laser light, generated by solid state, fiber or diode lasers. Here, we introduce a novel fiber technology capable of simultaneously controlling the beam profile and the angular divergence of single-mode (SM) and multi-mode (MM) beams using a single-optical fiber. Results of beam transformation from a SM to a MM beam with flat-top intensity profile are presented in the case of a controlled BPP at 3.8 mm*mrad. The scaling capabilities of this flat-top fiber design to achieve a range of BPP values while ensuring a flat-top beam profile are discussed. In addition, we demonstrate, for the first time to the best of our knowledge, the homogenizer capabilities of this novel technology, able to transform random MM beams into uniform flat-top beam profiles with very limited impact on the beam brightness. This study is concluded with a discussion on the scalability of this fiber technology to fit from 50 up to 1500 μm core fibers and its potential for a broader range of applications.

Paper Details

Date Published: 22 April 2016
PDF: 10 pages
Proc. SPIE 9727, Laser Resonators, Microresonators, and Beam Control XVIII, 97270T (22 April 2016); doi: 10.1117/12.2209348
Show Author Affiliations
C. Jollivet, Nufern Inc. (United States)
K. Farley, Nufern Inc. (United States)
M. Conroy, Nufern Inc. (United States)
J. Abramczyk, Nufern Inc. (United States)
S. Belke, ROFIN-SINAR Laser GmbH (Germany)
F. Becker, ROFIN-SINAR Laser GmbH (Germany)
K. Tankala, Nufern Inc. (United States)

Published in SPIE Proceedings Vol. 9727:
Laser Resonators, Microresonators, and Beam Control XVIII
Alexis V. Kudryashov; Alan H. Paxton; Vladimir S. Ilchenko, Editor(s)

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