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High-power single-pass pumped diamond Raman laser

: Heinzig, M.; Walbaum, T.; Williams, R.J.; Kitzler, O.; Mildren, R.P.; Schreiber, T.; Eberhardt, R.; Tünnermann, A.


Institute of Electrical and Electronics Engineers -IEEE-:
Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, CLEO/Europe-EQEC 2017 : 25-29 June 2017, Munich, Germany
Piscataway, NJ: IEEE, 2017
ISBN: 978-1-5090-6736-7
ISBN: 978-1-5090-6737-4
Conference on Lasers and Electro-Optics Europe (CLEO) <2017, Munich>
European Quantum Electronics Conference (EQEC) <2017, Munich>
Fraunhofer IOF ()

To date rare-earth-doped high-power fiber lasers or amplifiers are among the most versatile laser sources in scientific research and industrial applications, not only because of their high beam quality and high efficiency, but also because of their wide range of potential emission spectra. In recent years researchers have successfully scaled the average power and achieved multi kW level with Yb-doped fiber lasers around 1μm [1]. Whenever the spectrally dependent gain or the transmission range of the active medium limits the output power of much-needed laser sources at uncommon wavelengths, frequency conversion represents a versatile option to expand the spectral range at high power level and improve wavelength-dependent applications. In this article we report Raman frequency down-conversion of a 1 kW Yb-doped multi-stage fiber amplifier in a linear external diamond Raman cavity (DRL). For continuous wave Raman scattering process in diamond requires a high beam quality and narrow linewidth pump laser for achieving moderate thresholds and an efficient frequency conversion.