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5 February 2010 High-brightness pump sources using 2D VCSEL arrays
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Many applications require laser pump sources with high output power (tens to hundreds of Watts) in the smallest spot, with the smallest divergence. Such high-brightness pump sources typically use edge-emitting semiconductor lasers. However, it is also possible to use high-power two-dimensional vertical-cavity surfaceemitting laser (VCSEL) arrays for this purpose. Using a single 976nm 2D VCSEL array chip in an external cavity configuration, combined with a matching micro-lens array, we have demonstrated more than 30W output power from a 50μm/0.22NA fiber, corresponding to a brightness of 10MW/ This represents a substantial reduction in module complexity compared to edge-emitter based modules with similar brightness. These novel high-brightness pump sources exhibit some well-known intrinsic VCSEL performance features such as wavelength stability and narrow spectrum. Power and brightness can be scaled up using polarization and spectral combining.
© (2010) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jean-Francois Seurin, Guoyang Xu, Qing Wang, Baiming Guo, Robert Van Leeuwen, Alexander Miglo, Prachi Pradhan, James D. Wynn, Viktor Khalfin, and Chuni Ghosh "High-brightness pump sources using 2D VCSEL arrays", Proc. SPIE 7615, Vertical-Cavity Surface-Emitting Lasers XIV, 76150F (5 February 2010);

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