26 January 2005 Study on the output characteristics of a large-core Yb-doped double clad fiber laser
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Abstract
The output characteristics of a large-core double clad fiber (DCF) laser are experimentally investigated in this paper. The fiber laser is fabricated with 5m Yb-doped DCF that consists of a 30μm diameter core and a 400/340μm D-shape inner clad. The measured spectra show that the wavelength of laser is not stable at low pump levels, and the wavelength tends to be stabilized at 1074nm until the pump power is increased to a level far over the threshold. The maximum output power of 7.2W is obtained at an input pump of 11W with a FWHM of about 6nm. The slope efficiency and the total conversion efficiency are 84% and 65.5%, respectively.
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Hongxin Su, Hongxin Su, Qinglin Guo, Qinglin Guo, Kecheng Lu, Kecheng Lu, } "Study on the output characteristics of a large-core Yb-doped double clad fiber laser", Proc. SPIE 5627, High-Power Lasers and Applications III, (26 January 2005); doi: 10.1117/12.574937; https://doi.org/10.1117/12.574937
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