Beam-shaping element for compact fiber injection systems

Louis S. Weichman; Fred M. Dickey; Richard N. Shagam

doi:10.1117/12.382762

14 April 2000 Beam-shaping element for compact fiber injection systems

Louis S. Weichman, Fred M. Dickey, Richard N. Shagam

Proceedings Volume 3929, Solid State Lasers IX; (2000) https://doi.org/10.1117/12.382762
Event: Symposium on High-Power Lasers and Applications, 2000, San Jose, CA, United States

Abstract

Injection of high power, multi-mode laser profiles into a fiber optic delivery system requires controlling a number of injection parameters to maximize throughput and minimize concerns for optical damage both at the entrance and exit faces of the fiber optic. A simple method for simultaneously achieving a compact fiber injection geometry and control of these injection parameters, independent of the input source characteristics, is provided by a refractive lenslet array and simple injection lens configuration. Design criteria together with analytical and experimental results for the refractive lenslet array and short focal length injection lens are presented. This arrangement provides a uniform spatial intensity distribution at the fiber injection plane to a large degree independent of the source mode structure, spatial profile, divergence, size, and/or alignment to the injection system. This technique has application to a number of laser systems where uniform illumination of a target or remote delivery of high peak power is desired.

Citation Download Citation

Louis S. Weichman, Fred M. Dickey, and Richard N. Shagam "Beam-shaping element for compact fiber injection systems", Proc. SPIE 3929, Solid State Lasers IX, (14 April 2000); https://doi.org/10.1117/12.382762

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