23 February 2009 100-W 105-μm 0.15NA fiber coupled laser diode module
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Abstract
We report on the development of a high brightness laser diode module capable of coupling over 100W of optical power into a 105 μm 0.15 NA fiber at 976 nm. This module, based on nLIGHT's Pearl product architecture, utilizes hard soldered single emitters packaged into a compact and passively-cooled package. In this system each diode is individually collimated in the fast and slow axes and free-space coupled into a single fiber. The high brightness module has an optical excitation under 0.13 NA, is virtually free of cladding modes, and has an electrical to optical efficiency greater than 40%. Additionally, this module is compatible with high power 7:1 fused fiber combiners, and initial experiments demonstrated 500W coupled into a 220 μm, 0.22 NA fiber. These modules address the need in the market for higher brightness diode lasers for pumping fiber lasers and direct material processing.
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Scott R. Karlsen, Scott R. Karlsen, R. Kirk Price, R. Kirk Price, Mitch Reynolds, Mitch Reynolds, Aaron Brown, Aaron Brown, Ron Mehl, Ron Mehl, Steve Patterson, Steve Patterson, Robert J. Martinsen, Robert J. Martinsen, } "100-W 105-μm 0.15NA fiber coupled laser diode module", Proc. SPIE 7198, High-Power Diode Laser Technology and Applications VII, 71980T (23 February 2009); doi: 10.1117/12.809710; https://doi.org/10.1117/12.809710
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