Beam shaping system based on polymer spherical gradient refractive index lenses

Ramzi N. Zahreddine; Richard S. Lepkowicz; Robert M. Bunch; Eric Baer; Anne Hiltner

doi:10.1117/12.795001

18 September 2008 Beam shaping system based on polymer spherical gradient refractive index lenses

Ramzi N. Zahreddine, Richard S. Lepkowicz, Robert M. Bunch, Eric Baer, Anne Hiltner

Proceedings Volume 7062, Laser Beam Shaping IX; 706214 (2008) https://doi.org/10.1117/12.795001
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

A two-element laser beam shaping system based on spherical gradient refractive index (GRIN) lenses has been designed utilizing the optical design package CODE V®. The impetus for this design is the recent development of large diameter (~ 20 mm) layered polymer spherical GRIN lenses that can be fabricated with arbitrary index of refraction profiles between 1.490 and 1.573. A merit function is developed that includes the index range constraint, radius of curvature and thickness fabrication constraints, and a mapping function which maps the Gaussian irradiance profile into a flat-top profile. The designed system features high transmission efficiency, with nearly 100% of the energy transferred to the output beam and a variance of less than 3% in uniformity from the center to the edge of the beam. The adaptability of the lens making process allows for an additional degree of freedom in beam shaping.

Citation Download Citation

Ramzi N. Zahreddine, Richard S. Lepkowicz, Robert M. Bunch, Eric Baer, and Anne Hiltner "Beam shaping system based on polymer spherical gradient refractive index lenses", Proc. SPIE 7062, Laser Beam Shaping IX, 706214 (18 September 2008); https://doi.org/10.1117/12.795001

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