Spirally polarized OAM beam generation in few-mode fiber

Hari Krishna C.; V. D. R. Pavan; Sourabh Roy

doi:10.1117/12.2320258

7 September 2018 Spirally polarized OAM beam generation in few-mode fiber

Hari Krishna C., V. D. R. Pavan, Sourabh Roy

Proceedings Volume 10723, Optical Trapping and Optical Micromanipulation XV; 107232K (2018) https://doi.org/10.1117/12.2320258
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

We have generated a vortex beam with spiral polarization using a few-mode optical fiber. The excitation of the beam is controlled by coupling conditions of incident light beam with the fiber and the state of polarization of input Gaussian beam. The constituent orthogonal linearly polarized modes that contribute to the generation of such spiral vortex beam by inherent mode-mixing are also selectively excited by launching orthogonally polarized light into the fiber input end. Our experimental results suggests a strong dependency of polarization and phase of the fiber output beam on the state of polarization of input beam and are expected to be useful in mode conversion and controlled OAM beam generation. The obtained experimental results are best matched with simulation results.

Citation Download Citation

Hari Krishna C., V. D. R. Pavan, and Sourabh Roy "Spirally polarized OAM beam generation in few-mode fiber", Proc. SPIE 10723, Optical Trapping and Optical Micromanipulation XV, 107232K (7 September 2018); https://doi.org/10.1117/12.2320258

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