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Proceedings Paper

Visible up-conversion fiber laser with multiple switchable wavelengths
Author(s): Joerg Huenkemeier; Juergen Wolf; Arnold Stark; Michael Koetzing
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Paper Abstract

Pr-Yb doped ZBLAN glass optically pumped with NIR shows visible fluorescence generated by an up-conversion process. With diode laser pumping, laser emission from a single-mode Pr-Yb doped ZBLAN fiber has been achieved at 492, 520, 605, 635 and 717 nm. This makes it possible to build all solid state visible fiber lasers. Solutions for building color-switchable fiber lasers by the aid of an external resonator or by manipulation of the reflectivity of a dielectric mirror are discussed. Experiments with switching between two wavelengths are presented. A fiber laser with switchable emission from 10 mW at 492 nm to > 10 mW at 635 nm is introduced. The laser output noise is less than 1 % rms, the beam quality is M2 < 1.3, and the spectral width is < 1 nm (FWHM). Switching between 492 nm and 520 nm is also demonstrated. All wavelengths are generated within the same fiber resulting in identical boresight directions for different colors, and 100 % pointing stability. Fluorescence microscopy in life sciences is a typical application for this kind of laser.

Paper Details

Date Published: 22 April 2005
PDF: 7 pages
Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, (22 April 2005); doi: 10.1117/12.590320
Show Author Affiliations
Joerg Huenkemeier, Unique m.o.d.e. AG (Germany)
Juergen Wolf, Unique m.o.d.e. AG (Germany)
Arnold Stark, Hamburg Univ. (Germany)
Michael Koetzing, Unique m.o.d.e. AG (Germany)

Published in SPIE Proceedings Vol. 5709:
Fiber Lasers II: Technology, Systems, and Applications
L. N. Durvasula; Andrew J. W. Brown; Johan Nilsson, Editor(s)

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