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Innovation in diode laser design and technology, assembly techniques and optical design are used to realize high-brightness pump modules for application in pumping of fiber lasers. In a first demonstration, monolithically grating-stabilized diode lasers with wavelength around 970 nm are integrated into prototype modules that deliver 500 W of continuous wave TE-polarized optical power at a conversion efficiency ⪆ 55% within a spectral width of 1.2 nm (95% power) in a narrow beam, suitable for low-loss coupling into a 200-µm core fiber. An especially simple opto-mechanical configuration is developed, without need for external volume Bragg gratings.
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(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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M. Wilkens, P. S. Basler, B. Eppich, J. Fricke, A. Ginolas, M. Hübner, P. Crump, "High-brightness pumps for fiber lasers based on monolithically grating stabilized diode lasers," Proc. SPIE 12867, High-Power Diode Laser Technology XXII, 128670L (12 March 2024); https://doi.org/10.1117/12.3002553