Visible up-conversion fiber laser with multiple switchable wavelengths

Joerg Huenkemeier; Juergen Wolf; Arnold Stark; Michael Koetzing

doi:10.1117/12.590320

22 April 2005 Visible up-conversion fiber laser with multiple switchable wavelengths

Joerg Huenkemeier, Juergen Wolf, Arnold Stark, Michael Koetzing

Proceedings Volume 5709, Fiber Lasers II: Technology, Systems, and Applications; (2005) https://doi.org/10.1117/12.590320
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

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.

Citation Download Citation

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); https://doi.org/10.1117/12.590320

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