We demonstrate for the first time, to best of our knowledge, an all-fiber orbital angular momentum (OAM) multiplexer that multiplexes both OAM modes -l and +l up second order by using a mode-selective photonic lantern mode polarization controller. The experimentally obtained profiles are close theoretical results, purities higher than 89% all at 1550 nm. losses generations less 3.8 dB in C-band.

Stimulated Brillouin scattering (SBS) has many applications, for example, in sensing, microwave photonics and signal processing. Here we report the first experimental study of SBS chiral photonic crystal fiber (PCF), which displays optical activity robustly maintains circular polarization states against external perturbations. As a result, circularly polarized pump light is cleanly back-scattered into Stokes with orthogonal state, as required by angular momentum conservation. By comparison,...

Optical nonreciprocity, which breaks the symmetry between forward and backward propagating optical waves, has become vital in photonic systems enables many key applications. So far, all existing nonreciprocal are implemented for linearly or randomly polarized fundamental modes. vortex modes, with wavefronts that spiral around central axis of propagation, have been extensively studied over past decades offer an additional degree freedom useful Here, we report a light-driven isolation system...

Abstract Optical vortices, which have been extensively studied over the last decades, offer an additional degree of freedom useful in many applications, such as optical tweezers and quantum control. Stimulated Brillouin scattering (SBS), providing a narrow linewidth strong nonlinear response, has used to realize quasi‐continuous wave lasers. Here, stable oscillation vortices acoustic modes laser based on chiral photonic crystal fiber (PCF) is reported, robustly supports helical Bloch (HBMs)...

In this Letter, we theoretically and experimentally demonstrate a new method to generate tunable orbital angular momentum (OAM) by continuously changing the angle of linear polarization input light. We use Fourier series left- right-hand projections prove that average OAM smoothly varied from l=-1 l=1 with LP light 0 π, which is fulfilled an electrical controller.

Optical radiation force points to the same direction as photon flux, while reversal is quite challenging and necessitates special efforts. Herein, we present observation of a photonic nanojet-mediated backaction dielectric particles owing local heating solvent molecules inside nanojet in purely system. Such has been verified be photothermal, without influence from thermally induced turbulence. Our findings have theoretically corroborated by statistical analysis on size-dependent speed. In...

In this paper, the LP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">11</sub> mode evolution in a few mode-polarization maintaining fiber is experimentally investigated. Selective conversion from a/LP b to b/LP , OAM xmlns:xlink="http://www.w3.org/1999/xlink">+1</sub> and xmlns:xlink="http://www.w3.org/1999/xlink">-1</sub> modes are demonstrated with varying wavelengths lengths. This property may have nice applications spatial division...

In this paper, a fiber-based tunable mode rotator is proposed and demonstrated by using the few mode-polarization maintaining fiber (FM-PMF). The birefringence in FM-PMF causes phase difference between two orthogonal degenerate modes. With rotating segment getting variation of aligning angle injected LP11 (LP21) axis axis, another intended with certain orientation can be controllably generated at output.

An all-fiber broadband degenerate mode rotator for the rotation between arbitrary modes is proposed and investigated numerically. Furthermore, combined with a selective coupler (MSC) can be used to realize multiplexing. The multiplexing implemented in one physical dimension, which considered easier than 3-D cascading MSCs. It found that any two possesses high rotating efficiency from 1450 1650 nm, insertion loss at interconnection of fiber-based normal fiber lower 3 dB modes. Moreover,...

We propose and experimentally demonstrate a novel scheme to generate LP11/LP21 modes with tunable mode lobe orientation (MLO). Wherein, the MLOs have an excellent linear relationship linearly-polarized states of input fundamental modes. The proposed is composed polarization controller (PC), converter, (PMC) which twined few fiber (FMF) polarizer. Experimental results show that deviations between generated simulated ones are less than 3.5 8 degrees over C band. Since control up nanosecond...

We demonstrated a low-loss and wide-band all-fiber OAM generator/multiplexer for SDM systems by cascading mode selective photonic lantern mode-polarization controller. This device can be upgraded to higher order has potential complex vector beams applications.

Optical vortex states-higher optical modes with helical phase progression and carrying orbital angular momentum-have been explored to increase the flexibility capacity of fibres employed for example in mode-division-multiplexing, trapping multimode imaging. A common requirement such systems is high fidelity transfer signals between different frequency bands modes, which not so straightforward. Here we report intervortex conversion backward-propagating circularly polarised at one wavelength,...

Stimulated Brillouin scattering (SBS) is a highly efficient nonlinear optical interaction between acoustic waves and light. It enables the mediation of spectrally fine radio-frequency signals, with potential applications in quantum signal processing. Here, we investigate storage state polarization light silica nanofiber (ONF) that guides both optic waves. adds an extra degree information to optoacoustic memories. The ONF possesses multiple modes. We show promising results read/write...

We design a three mode elliptical-core mode-selective photonic lantern (EC-MSPL) which can match well with the elliptical core few fiber in MIMO-free MDM systems. The crosstalk of EC-MSPL are below −20dB for all modes.

A six mode asymmetric fiber (AF) for MIMO-free MDM is proposed by inducing two inner-cores in the core. Simulation results show that correlation coefficient between AF and circle core higher than 95% all modes with effective index differences no less 3.8×10−4.

An all-fiber based tapered mode selective coupler (AFTMSC) is proposed and it can convert LP01 to higher-order modes (LP11, LP21 LP02 mode) with coupling efficiency better than 70% in wavelength range of 1450nm 1650nm.

All-fiber broadband mode multiplexer based on degenerate rotator and tapered selective coupler is proposed. Six modes can be multiplexed get high coupling efficiencies in 200nm wavelength band.

In few-mode polarization-maintaining-fiber (FM-PMF), the effective-index splitting exists not only between orthogonally polarization state but also degenerated modes within a high-order mode group. Hence besides evolution, patterns in each LP set are need to be analyzed. this letter, completed firstorder (LP11 mode) evolution PM-FMF is analyzed and represented by analogous Jones vector Poincarésphere respectively. Furthermore, with matrix analysis, modal dynamics FM-PMFs conveniently The...

Stimulated Brillouin scattering (SBS) in optical fibres, which guided light is parametrically reflected by coherent acoustic phonons, provides a powerful and flexible mechanism for controlling light, has recently been demonstrated with orbital angular momentum (OAM) modes special annular-core fibre [1] . Helically twisted photonic crystal (PCF) robustly supports circularly-polarised helical Bloch (HBMs) displays OAM birefringence, i.e., equal opposite orders have different propagation...

We report the first experimental study of stimulated Brillouin scattering and lasing by circularly polarized vortex modes in chiral photonic crystal fibers, demonstrate conservation spin orbital angular momentum.

Polarization maintaining fibers (PMFs) can keep linear polarization state against external perturbations by inducing a high effective refractive index difference (&Delta;neff) along one axis. For few mode (FM-PMFs), &Delta;neff is applicable between both orthogonal modes (e.g. LP_01x and LP_01y) degenerated LP_11a LP_11b), which enable advanced functionalities in multiple-input multiple- output-free spatial division multiplexing systems optical fiber...

Forward Brillouin scattering (FBS) in optical fibres, which co-propagating modes are coupled by acoustic modes, provides a powerful and flexible mechanism for controlling the structure frequency of light fields, with applications in, e.g., high harmonic mode-locked fibre lasers [1] sensing [2]. Here we report observation seeded inter-vortex three-fold rotationally symmetric photonic crystal (PCF) [3], mediated rotating higher order flexural mode, sometimes known as "screw mode" [4].

We report frequency conversion of vortex states mediated by chiral flexural phonons in inter-vortex forward Brillouin scattering. The allows the angular momenta converted waves to be coherently linked original signals.