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Updated: Jun 23, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
All-fiber few-mode interference for complex azimuthal pattern generation
Josué I Gómez-Méndez1, Rodolfo A Carrillo-Betancourt2, Daniel A May-Arrioja3
1Applied Physics Group, DICIS, University of Guanajuato, 368850, Salamanca, Guanajuato, Mexico.
Abstract:
We report on an all-fiber setup capable of generating complex intensity patterns using interference of few guided modes. Comprised by a few-mode fiber (FMF) spliced to a multimodal interference (MMI) fiber device, the setup allows for obtaining different output patterns upon adjusting the phases and intensities of the modes propagating in the FMF. We analyze the output patterns obtained when exciting two family modes in the MMI device using different phase and intensity conditions for the FMF modal base. Using this simple experimental arrangement we are able to produce complex intensity patterns with radial and azimuthal symmetry. Moreover, our results suggest that this approach provides a means to generate beams with orbital angular momentum (OAM).
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