Propagation of transverse photonic orbital angular momentum through few-mode fiber

Abstract

Spatiotemporal optical vortex (STOV) pulses can carry transverse orbital angular momentum (OAM) that is perpendicular to the direction of pulse propagation. For a STOV pulse, its spatiotemporal profile can be significantly distorted due to unbalanced dispersive and diffractive phases. This may limit its use in many research applications, where a long interaction length and a tight confinement of the pulse are needed. The first demonstration of STOV pulse propagation through a few-mode optical fiber is presented. Both numerical and experimental analysis on the propagation of STOV pulse through a commercially available SMF-28 standard telecommunication fiber is performed. The spatiotemporal phase feature of the pulse can be well kept after the pulse propagates a few-meter length through the fiber even with bending. Further propagation of the pulse will result in a breakup of its spatiotemporal spiral phase structure due to an excessive amount of modal group delay dispersion. The stable and robust transmission of transverse photonic OAM through optical fiber may open new opportunities for transverse photonic OAM studies in telecommunications, OAM lasers, and nonlinear fiber-optical research.

Multidimensional multiplexing holography based on optical orbital angular momentum lattice multiplexing

“…To overcome these limitations, the use of optical orbital angular momentum (OAM) as an additional information bearer in holography has gained increasing attention. [12][13][14][15] OAM collection is distinguished by its angular vortex phases, providing an endless array of unique mode channels for multiplexing. [16][17][18] Recent developments have showcased practical implementations of OAM multiplexed holography, establishing it as a standalone information channel.…”

Optimization of Transverse OAM Transmission through Few-Mode Fiber

“…To overcome the challenges associated with long-distance STOV pulse propagation and the preservation of the spatiotemporal vortex phase characteristics exhibited by STOV pulses, the utilization of step-index, few-mode fiber (FMF), namely, SMF-28, as the transmission medium is proposed and experimentally demonstrated at the wavelength of 1030 nm [22]. Under the weakly guidance assumption, the STOV pulse coupled into a fiber can be decomposed into two LP modes, namely, the LP 01 and LP 11 modes.…”

High-power mode-programmable orbital angular momentum beam emitter with an internally sensed optical phased array

“…Owing to these unique physical properties, the OAM beam holds promising prospects both in photonic technologies and physical study [15,16] . Accordingly, the technique of generating the OAM beam has inspired researchers to develop it intensively [14,[17][18][19][20][21] . For instance, the OAM beam can be generated effectively by utilizing specially designed optical devices, such as spatial light modulators (SLMs) [22][23][24] , metasurfaces [25,26] , and Dammann gratings [27] .…”