Polarization converter for higher-order laser beams based on the use of forming binary diffractive optical elements as beam splitter


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Abstract

We propose a new approach to generating a pair of initial beams for a polarization converter that operates by summing up two opposite-sign circularly polarized beams. The conjugated pairs of vortex beams matched with laser modes are generated using binary diffractive optical elements. The same binary element simultaneously serves two functions: a beam shaper and a beam splitter. Two proposed optical arrangements are compared in terms of alignment complexity and energy efficiency. The diffractive optical elements in question have been designed and fabricated. Natural experiments that demonstrate the generation of vector higher-order cylindrical beams have been conducted.

About the authors

Sergey V Karpeev

S. P. Korolyov Samara State Aerospace University (National Research University)

Email: karp@smr.ru
(Dr. Sci. (Phys. & Math.)), Professor, Dept. of Nanoengineering 34, Moskovskoe sh., Samara, 443086, Russia

Svetlana N Khonina

S. P. Korolyov Samara State Aerospace University (National Research University)

Email: khonina@smr.ru
(Dr. Sci. (Phys. & Math.)), Leading Research Scientist, Lab. of Laser Measurement 151, Molodogvardeyskaya st., Samara, 443001, Russia

Oleg Yu Moiseev

Image Processing Systems Institute, Russian Academy of Sciences

Email: moiseev@smr.ru
(Ph. D. (Techn.)), Senior Research Scientist, Lab. of Micro and Nanotechnology 151, Molodogvardeyskaya st., Samara, 443001, Russia

Sergey V Alferov

S. P. Korolyov Samara State Aerospace University (National Research University)

Email: alferov_s@mail.ru
Postgraduate Student, Dept. of Nanoengineering 34, Moskovskoe sh., Samara, 443086, Russia

Aleksey V Volkov

S. P. Korolyov Samara State Aerospace University (National Research University)

Email: volkov@ssau.ru
(Dr. Sci. (Phys. & Math.)), Professor, Dept. of Nanoengineering 34, Moskovskoe sh., Samara, 443086, Russia

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