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Steadying the output of fiber lasers

High-power fiber lasers are used in a range of scientific fields in addition to their standard use for technology. However, increases in laser output power are limited by nonlinear effects that can damage the optical components and reduce the beam quality. Rothe et al. used a spatial wavefront-shaping technique for multimode fiber lasers that mitigates their detrimental processes, thus enabling output power to be increased appreciably while maintaining beam quality.