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Researchers from École Polytechnique Fédérale de Lausanne (EPFL) have developed a method of nonlinear beam cleaning in a multimode laser cavity. The technique establishes a new approach for the generation of high-energy ultrashort pulses with single-mode beam quality. As a result, the work enables fiber lasers to offer the same power levels as solid-state lasers without requiring cascaded amplifiers, Ugur Tegin told Photonics Media. Tegin is lead author of the study describing the advance.
Due to the small core size of the single-mode fibers, mode-locked fiber lasers suffer from high nonlinear, affecting their power levels. Mode-locked single-mode fibers are attractive due to certain advantages in high-gain doping,…