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Updated: Jul 15, 2026
Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Passive combination of multiple beams in an optical fiber via stimulated Brillouin scattering
Kirk C Brown1, Timothy H Russell, Thomas G Alley
1Department of Engineering Physics, Air Force Institute of Technology (AFIT/ENP), Ohio 45433, USA. kirk.brown@rl.af.mil
Abstract:
We demonstrate passive combination of multiple beams in an optical fiber via stimulated Brillouin scattering (SBS). Four off-axis beams are combined in a long multimode optical fiber using a novel all-optical mount. The combined beam has the high spatial coherence properties of the LP(01) mode owing to the beam cleanup properties of SBS. The threshold for SBS when off-axis pumps are used is shown to be a factor of 13 times higher than for on-axis pump beams. We propose this method would improve the brightness of an array of fiber amplifiers.