Quasi-ray description of intermode interference of the radiation of optical vortices in short fiber lightguides

Кизеветтер Д.В. Квазилучевое описание межмодовой интерференции излучения оптических вихрей в коротких волоконных световодах // Оптический журнал. 2008. Т. 75. № 1. С. 80–82.

Kiesewetter D.V. Quasi-ray description of intermode interference of the radiation of optical vortices in short fiber lightguides [in Russian] // Opticheskii Zhurnal. 2008. V. 75. № 1. P. 80–82.

D. V. Kisevetter, "Quasi-ray description of intermode interference of the radiation of optical vortices in short fiber lightguides," Journal of Optical Technology. 75 (1), 64-66 (2008). https://doi.org/10.1364/JOT.75.000064

This paper presents a quasi-ray physical model that takes into account the curvature of the reflecting surface of the core when a ray propagates in a fiber lightguide. It is shown to be possible to use such an approach to estimate the intensity distribution of radiation coming out of a short lightguide. The effect in which spiral distributions appear is explained. It is experimentally confirmed that oblique rays in fibers predominantly create optical vortices with a single direction of wave-front rotation.