Gómez-Méndez Josué I, Carrillo-Betancourt Rodolfo A, May-Arrioja Daniel A, Velázquez-Benítez Amado M, Cuando-Espitia Natanael, Hernández-Cordero Juan
Applied Physics Group, DICIS, University of Guanajuato, 368850, Salamanca, Guanajuato, Mexico.
Instituto de Investigaciones en Materiales, UNAM, Cd Universitaria, 04510, Mexico City, Mexico.
Sci Rep. 2024 Apr 22;14(1):9261. doi: 10.1038/s41598-024-59843-5.
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).
我们报道了一种全光纤装置，它能够利用少数导模的干涉产生复杂的强度图案。该装置由一根拼接至多模干涉（MMI）光纤器件的少模光纤（FMF）组成，通过调整在FMF中传播的模式的相位和强度，能够获得不同的输出图案。我们分析了在MMI器件中激发两个族模时，在FMF模态基的不同相位和强度条件下所获得的输出图案。利用这种简单的实验装置，我们能够产生具有径向和方位对称性的复杂强度图案。此外，我们的结果表明，这种方法提供了一种产生具有轨道角动量（OAM）光束的手段。
