17 March 2005 High-efficiency 970-nm multimode pumps
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Abstract
Ultra-reliable very efficient multimode diodes have been developed. 90 micrometer wide aperture chip-on-submount demonstrate 67% peak power conversion efficiency at 25°C and 60% peak power efficiency at 85°C heatsink temperature; while record high thermal limited peak power in excess of 15 W CW is achieved at 15°C. State-of-the-art performance of Chip-on-Submount does not compromise its reliability; over 1,000,000 hours Mean Time Between Failures has been demonstrated. Cooler-less package design ensures thermal resistance of 4.5°C/W from the Chip-on-Submount to external heatsink; coupling efficiency of 95% into 0.15 NA at over 5 W power in 100 μm dia. fiber are routinely obtained. Results of multi-cell accelerated tests of packaged pumps yielded over 10 years of uninterrupted use MTBF at over 5W CW ex-fiber output.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Valentin Gapontsev, Igor Berishev, Glenn Ellis, Alexey Komissarov, Nikolay Moshegov, Oleg Raisky, Pavel Trubenko, Vladimir Ackermann, Eugene Shcherbakov, Jorg Steinecke, Alexander Ovtchinnikov, "High-efficiency 970-nm multimode pumps", Proc. SPIE 5711, High-Power Diode Laser Technology and Applications III, (17 March 2005); doi: 10.1117/12.585907; https://doi.org/10.1117/12.585907
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