7 March 2014 Investigation of a large core 976nm Yb fiber laser for high brightness fiber-based pump sources
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We demonstrate three-level laser operation at 976 nm of a large-core Yb-doped aluminosilicate fiber, which is fabricated by powder-sinter technology and shows a very homogeneous refractive index profile. The investigated fiber has a core diameter of 126 μm and a numerical aperture of 0.18, well-matched to standard fiber coupled pump diodes. The core composition has been optimized to reduce photodarkening effects. Multimode and single mode operation with multiple Watts output power is presented for this fiber making it useful for the realization of high brightness fiber coupled pump sources.
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Martin Leich, Martin Leich, Matthias Jäger, Matthias Jäger, Stephan Grimm, Stephan Grimm, Jan Dellith, Jan Dellith, Denny Hoh, Denny Hoh, Sylvia Jetschke, Sylvia Jetschke, Martin Becker, Martin Becker, Alexander Hartung, Alexander Hartung, Tina Eschrich, Tina Eschrich, Jens Kobelke, Jens Kobelke, Hartmut Bartelt, Hartmut Bartelt, "Investigation of a large core 976nm Yb fiber laser for high brightness fiber-based pump sources", Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 89610Z (7 March 2014); doi: 10.1117/12.2039169; https://doi.org/10.1117/12.2039169

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