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Updated: May 25, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
First demonstration and detailed characterization of a multimode amplifier for Space Division Multiplexed
1Optoelectronics Research Centre, University of Southampton, Southampton, SO17 1BJ, UK. ymj@orc.soton.ac.uk
Abstract:
We present the first demonstration of a multimode (two mode-group) erbium-doped fiber amplifier for Space Division Multiplexed (SDM) applications and demonstrate various design and performance features of such devices. In particular we experimentally demonstrate that differential modal gains can be controlled and reduced both by fiber design and control of the pump field distribution. Using a suitably designed fiber we demonstrate simultaneous modal gains of ~20 dB for different pair-wise combinations of spatial and polarization modes in an EDFA supporting amplification of 6 distinct modes.
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