Yang Yue

Xi'an Jiaotong University, China

Title: Highly dispersive vortex modes in optical fibers

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Biography

Yang Yue received the Ph.D. degree in electrical engineering from the University of Southern California, USA, in 2012. He is a Professor with the School of Information and Communications Engineering, Xi'an Jiaotong University, China. Dr. Yue’s current research interest is intelligent photonics, including optical communications, optical perception, and optical chip. He has published over 240 journal papers (including Science) and conference proceedings with >10,000 citations, five edited books, two book chapters, >60 issued or pending patents, >200 invited presentations (including 1 tutorial, >30 plenary and >50 keynote talks). Dr. Yue is a Fellow of SPIE, a Senior Member of IEEE and Optica. He is an Associate Editor for IEEE Access and Frontiers in Physics, Editor Board Member for four other scientific journals, Guest Editor for >10 journal special issues. He also served as Chair or Committee Member for >100 international conferences, Reviewer for >70 prestigious journals.

Abstract

The demand on information transmission capacity is exponentially increasing, which promotes the research in high-capacity optical transmission systems. Space division multiplexing (SDM) has attracted great interest because of its potential in dramatically increasing the data capacity. The intrinsic orthogonality among orbital angular momentum (OAM) modes with varied l contributes to the theoretically infinite quantity of beams carrying OAM, which introduces a new degree of freedom to SDM. Chromatic dispersion (CD) is one of the key factors in optical systems, which is extensively used in time lens, microwave photonics subsystems and true time-delay beam former. This talk presents the dispersion characteristics of vortex modes supported in optical fibers.

Here, we introduce some specialty optical fibers for supporting highly dispersive vortex modes. First, the basic concept and applications of chromatic dispersion and vortex modes are briefly introduced. Then, the structures and principle of the highly dispersive conventional fiber for fundament mode and the double ring-core fiber for vortex modes are depicted and compared. In order to visualize the coupling process, we present properties of the OAM mode in the double ring-core fiber, including the effective refractive index, effective mode area, ratio of power integral, chromatic dispersion, and loss. The OAM_1,1 mode supported in the designed coupled ring-core fiber can achieve an extremely negative chromatic dispersion as low as -86,288 ps/(nm·km) at 1535.4 nm. Furthermore, the OAM_130,1 mode supported in the Schott glass coupled ring-core fiber has a large negative chromatic dispersion of -20,271 ps/(nm·km) at 1260.4 nm. The photonic crystal fiber and triple ring-core fiber, which share the same principle with the dual-ring fiber, are also briefly introduced as supplementary. We believe the highly dispersive optical fiber for OAM modes may find more promising applications in fiber-optic OAM systems.