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22 April 2005 Visible up-conversion fiber laser with multiple switchable wavelengths
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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.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joerg Huenkemeier, Juergen Wolf, Arnold Stark, and Michael Koetzing "Visible up-conversion fiber laser with multiple switchable wavelengths", Proc. SPIE 5709, Fiber Lasers II: Technology, Systems, and Applications, (22 April 2005);


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