Simultaneous Control of Orbital Angular Momentum and Beam Profile in Two-mode Polarization-maintaining Fiber

Publication Date

12-12-2016

Document Type

Article

Organizational Units

College of Natual Science and Mathematics

Keywords

Amplified spontaneous emission, Beam shaping, Laser beams, Optical vortices, Polarization maintaining fibers, Vortex beams

Abstract

We report simultaneous control of the orbital angular momentum (OAM) and beam profile of vortex beams generated in two-mode polarization-maintaining optical fiber. Two higher-order eigenmodes of the fiber are combined to form optical vortices. Reduced coherence between the fiber modes decreases the mode purity. Varying the coherence of the fiber modes changes the average OAM while maintaining a constant annular intensity profile. Additionally, a donut mode has been shown to be insensitive to bends and twists in the fiber.

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