Related Experiment Video
Updated: Mar 7, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Demonstration of km-scale orbital angular momentum multiplexing transmission using 4-level pulse-amplitude modulation
Abstract:
By designing and fabricating two kinds of orbital angular momentum (OAM) fibers, we demonstrate two OAM modes (OAM+1 and OAM-1) multiplexing transmission and demultiplexing in OAM fiber links. Moreover, we also experimentally demonstrate 4-level pulse-amplitude modulation (PAM-4) signal transmission using two OAM modes multiplexing in a km-scale OAM fiber and achieve a bit-error rate (BER) below 2×10-3 without multiple-input-multiple-output (MIMO) digital signal processing (DSP). The obtained results with favorable data-carrying OAM multiplexing transmission performance show potential application in km-scale short-reach optical interconnects.
Related Concept Videos
NMR Spectrometers: Radiofrequency Pulses and Pulse Sequences
Design Example: Capacitance Multiplier Circuit
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
¹H NMR Signal Multiplicity: Splitting Patterns
Propagation Speed of Electromagnetic Waves
Double Resonance Techniques: Overview
Spin decoupling is usually achieved by...
Maximum Power Transfer
By substituting the entire circuit with...

