Novel active DC fiber designs mitigating SRS and TMI in industrial lasers operating above 2 kW (Conference Presentation)

Joshua Bradford

doi:10.1117/12.2551361

11 March 2020 Novel active DC fiber designs mitigating SRS and TMI in industrial lasers operating above 2 kW (Conference Presentation)

Joshua Bradford

Author Affiliations +

Proceedings Volume 11260, Fiber Lasers XVII: Technology and Systems; 1126007 (2020) https://doi.org/10.1117/12.2551361
Event: SPIE LASE, 2020, San Francisco, California, United States

Abstract

New large mode area Ytterbium-doped fiber (LMA-YDF) designs for 400µm clad laser oscillators are investigated. Designs are optimized to simultaneously overcome limitations of Stimulated Raman Scattering (SRS) and Thermal Mode Instability (TMI) within the limitations set by the industrial laser market. The optimization enable industrial fiber lasers operating at 1µm wavelengths to robustly provide > 2kW with single mode beam quality. 915 nm pumping and 976 nm pumping require different designs due to different thermal loads. Wavelength specific options are given for both that robustly increase power from the current state of the art 1-1.5kW to up to 2.3kW.

Conference Presentation

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Joshua Bradford "Novel active DC fiber designs mitigating SRS and TMI in industrial lasers operating above 2 kW (Conference Presentation)", Proc. SPIE 11260, Fiber Lasers XVII: Technology and Systems, 1126007 (11 March 2020); https://doi.org/10.1117/12.2551361

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