6 April 2017 Redistribution of the laser beam power using diffractive optical elements
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Proceedings Volume 10342, Optical Technologies for Telecommunications 2016; 103420G (2017) https://doi.org/10.1117/12.2270762
Event: XIV International Scientific and Technical Conference on Optical Technologies in Telecommunications, 2016, Samara, Russian Federation
Abstract
The use of laser technologies in the production of optical fiber requires a careful choice of optical systems for positioning and transforming the laser beam. The purpose of this research is to determine a possibility of the redistribution of the laser beam power using diffractive optical elements. It was determined that for a radius of the focusable beam Rf = rf =2.2×10-2 m, the length of the focal spot will be increased to a value L =13.6×10-3 m, which is 1.2 times larger than Rf = rf =1.8×10-2 m. In this case, the intensity of the laser beam at the centre of the focal spot, q0 , and the maximum value, qmax , decreased by 1.1 times. An approximation of function q(x, y) by polynomials of degree n =5and m =3 was performed. It is shown that the maximal relative error of approximation does not exceed 4%, and the relative error of approximation in the centre of the focal spot does not exceed 3%. Presented equations can be used to calculate the intensity distribution in the focal plane of diffractive optical elements.
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Serguei P. Murzin, Gerhard Liedl, Robert Bielak, "Redistribution of the laser beam power using diffractive optical elements", Proc. SPIE 10342, Optical Technologies for Telecommunications 2016, 103420G (6 April 2017); doi: 10.1117/12.2270762; https://doi.org/10.1117/12.2270762
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