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Propagation of noninteger cylindrical vector vortex beams in a gradient-index fiber
Optics Letters
|May 1, 2023
Summary
Noninteger cylindrical vector vortex beams (NCVVBs) show stable transmission in radial gradient-index (GRIN) fibers. Spin-orbit interactions, affecting spin and orbital angular momentum, were observed for the first time in this setup.
Area of Science:
- Optics and Photonics
- Fiber Optics
- Beam Propagation
Background:
- Vector vortex beams (VVBs) are crucial for advanced optical applications.
- Gradient-index (GRIN) fibers offer unique light manipulation properties.
- Understanding beam behavior in GRIN fibers is essential for optical communication and sensing.
Purpose of the Study:
- To analyze the propagation characteristics of noninteger cylindrical vector vortex beams (NCVVBs) in a radial GRIN fiber.
- To investigate the spin-orbit interactions of NCVVBs within the GRIN fiber.
- To observe changes in polarization, spin angular momentum (SAM), and orbital angular momentum (OAM).
Main Methods:
- Utilizing the generalized Huygens-Fresnel principle for theoretical analysis.
- Simulating the propagation of NCVVBs through a radial GRIN fiber.
- Observing beam characteristics at the focal plane of the GRIN fiber.
Main Results:
- NCVVBs demonstrate periodic and stable transmission in the radial GRIN fiber.
- Significant polarization changes were observed at the focal plane.
- Alterations in SAM and OAM of NCVVBs were detected.
Conclusions:
- The study confirms the stable transmission of NCVVBs in radial GRIN fibers.
- Spin-orbit interactions of NCVVBs are experimentally verified in radial GRIN fibers for the first time.
- These findings pave the way for novel optical devices utilizing NCVVBs in GRIN media.
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