УДК: 621.373

Single-coordinate filter with variable transmission across aperture

Belkov, S.A., Voronich, I.N., Garanin, S.G., Zimalin, B.G., Sizmin, D.V.

Publication in Journal of Optical Technology

For Russian citation (Opticheskii Zhurnal):

Бельков С.А., Воронич И.Н., Гаранин С.Г., Зималин Б.Г., Сизмин Д.В. Однокоординатный фильтр с переменным по апертуре пропусканием // Оптический журнал. 2016. Т. 83. № 3. С. 48–54.

Belkov S.A., Voronich I.N., Garanin S.G., Zimalin B.G., Sizmin D.V. Single-coordinate filter with variable transmission across aperture [in Russian] // Opticheskii Zhurnal. 2016. V. 83. № 3. P. 48–54.

For citation (Journal of Optical Technology):

S. A. Bel’kov, I. N. Voronich, S. G. Garanin, B. G. Zimalin, and D. V. Sizmin, "Single-coordinate filter with variable transmission across aperture," Journal of Optical Technology. 83(3), 175-180 (2016). https://doi.org/10.1364/JOT.83.000175

Abstract:

A filter that shapes a laser beam to achieve a specified spatial intensity profile along a single coordinate is developed and studied. The filter consists of a diffractive element fabricated by laser-etching the surface of a transparent dielectric plate and a spatial angle selector. The diffractive element has a radiation damage threshold of 6 J/cm² at pulse width 3 ns. A three-dimensional intensity profile in the form of a parabola extending along one coordinate was experimentally produced; this intensity profile is used to compensate for spatial distortion of the beam in the main gain beamline of high-power neodymium laser systems.

Keywords:

diffractive element, spatial profile, laser cutting, square aperture, angular selection

OCIS codes: 110.1220, 110.6980, 140.3300

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