We demonstrate an all optical waveguide imprinted by a low power Laguerre Gaussian control laser beam using a coherent Raman process in warm atomic rubidium vapor. We show that the signal beam propagates with a small spot size over several diffraction lengths. We also show that the coupling efficiency of the signal beam into the waveguide varies linearly with the signal power.
P. K. Vudyasetu, D. J. Starling, and J. C. Howell, All Optical Waveguiding in a Coherent Atomic Rubidium Vapor, Phys. Rev. Lett. 102(12), 123602. https://doi.org/10.1103/PhysRevLett.102.123602
American Physical Society