Mode profiling of optical fibers at high laser powers

Peter Carøe Nielsen, David Bue Pedersen, R.B. Simonsen, D.N. Erschens, M.F. Lilbæk, Lars Eskildsen, Karsten Rottwitt, Hans Nørgaard Hansen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

This paper describes the development of a measuring equipment capable of analysing the beam profile at high optical powers emitted by delivery fibers used in manufacturing processes. Together with the optical delivery system, the output beam quality from the delivery fiber and the shape of the focused spot can be determined. The analyser is based on the principle of a rotating wire being swept though the laser beam, while the reflected signal is recorded [1]. By changing the incident angle of the rotating rod from 0° to 360° in relation to the fiber, the full profile of the laser beam is obtained. Choosing a highly reflective rod material and a sufficiently high rotation speed, these measurements can be done with high laser powers, without any additional optical elements between the fiber and analyzer. The performance of the analyzer was evaluated by coupling laser light into different fibers, and measuring the output beam profiles. Fibers with different core diameters and different surface qualities were tested.
Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Volume6873
PublisherSPIE - International Society for Optical Engineering
Publication date2008
Pages687318
DOIs
Publication statusPublished - 2008
EventFiber Lasers V: Technology, Systems, and Applications - San Jose, California, USA
Duration: 1 Jan 2008 → …

Conference

ConferenceFiber Lasers V: Technology, Systems, and Applications
CitySan Jose, California, USA
Period01/01/2008 → …
SeriesProceedings of SPIE, the International Society for Optical Engineering
Volume6873
ISSN1605-7422

Bibliographical note

©2008 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.

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