Light's orbital angular momentum (OAM) is a conserved quantity in cylindrically symmetric
media. However, it is easily destroyed by free-space turbulence or fiber bends, because …

We present a fiber-based method for generating vortex beams with a tunable value of orbital
angular momentum (OAM) from− 1 h to+ 1 h per photon. We propose a new method to …

The burgeoning advances of spatial mode conversion in few-mode fibers emerge as the
investigative hotspot in novel structured light manipulation, in that, high-order modes …

Acoustic modes propagating in cylindrical solid rods are considered. A review of the
properties of several mode groups is given, and computed results are shown for a wide …

This work presents a short review of the current research on the acousto-optic mechanism
applied to optical fibers. The role of the piezoelectric element and the acousto-optic …

Cylindrical-vector beams (CVBs) with axial symmetry in polarization and field intensity are
gathering increasing attention from fundamental research to practical applications. However …

Bragg gratings in optical fibers in multimode propagation are investigated theoretically by
using the coupled-mode theory and considering two modes coupling. Bragg gratings in …

A modulator is reported in which an extensional acoustic wave is launched along a fiber
Bragg grating. The acousto-optic superlattice effect causes an enhancement in reflectivity …

We demonstrate an all-fiber acousto-optic tunable filter based on two-spatial-mode coupling,
with improved ruggedness and efficiency, by using a new acoustic-transducer design. We …

This paper reports a 100% efficient Bragg-grating-based acoustooptic superlattice
modulator in a fiber whose diameter is reduced by HF etching. The acoustically induced …