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4 March 2016 Advances in high-power 9XXnm laser diodes for pumping fiber lasers
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Abstract
A multi-mode 9XXnm-wavelength laser diode was developed to optimize the divergence angle and reliable ex-facet power. Lasers diodes were assembled into a multi-emitter pump package that is fiber coupled via spatial and polarization multiplexing. The pump package has a 135μm diameter output fiber that leverages the same optical train and mechanical design qualified previously. Up to ~ 270W CW power at 22A is achieved at a case temperature ~ 30ºC. Power conversion efficiency is 60% (peak) that drops to 53% at 22A with little thermal roll over. Greater than 90% of the light is collected at < 0.12NA at 16A drive current that produces 3.0W/(mm-mr)2 radiance from the output fiber.
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Jay Skidmore, Matthew Peters, Victor Rossin, James Guo, Yan Xiao, Jane Cheng, Allen Shieh, Raman Srinivasan, Jaspreet Singh, Cailin Wei, Richard Duesterberg, James J. Morehead, and Erik Zucker "Advances in high-power 9XXnm laser diodes for pumping fiber lasers", Proc. SPIE 9733, High-Power Diode Laser Technology and Applications XIV, 97330B (4 March 2016); https://doi.org/10.1117/12.2213677
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