Related Experiment Video
Updated: May 11, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
Published on: August 12, 2013
Diffractive optical elements for mode-division multiplexing of temporal signals with the aid of Laguerre-Gaussian
Shoam Shwartz1, Michael Golub, Shlomo Ruschin
1School of Electrical Engineering, Department of Physical Electronics, Tel Aviv University, Ramat Aviv, Israel. shoamsh@gmail.com
Abstract:
Optical aspects of space-division multiplexing with orthogonal modes of coherent light were considered in theory and experiments with the coherent optical correlator. We resorted to the mathematical tool of generating functions and technologies of diffractive optical elements to implement complex spatial filters matched to rotationally symmetrical transverse modes. Successful multiplexing and demultiplexing in free-space transmission of low-frequency temporally modulated signals through different spatial modes was demonstrated. Experimental results show low cross talk between different mode channels and feasibility of further applications in multimode fiber optical communication data links.

