15 February 2018 High-power single-pass pumped diamond Raman oscillator
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Abstract
We present our recent advances on power scaling of a high-power single-pass pumped CVD-diamond Raman oscillator at 1.2 μm. The single pass scheme reduced feedback to the high gain fiber amplifier, which pumps the oscillator. The Yb-doped multi-stage fiber amplifier itself enables up to 1 kW output power at a narrow linewidth of 0.16 nm. We operate this laser in quasi-cw mode at 10% duty cycle and on-time (pulse) duration of 10 ms. With a maximum conversion efficiency of 39%, a maximum steady-state output power of 380 W and diffraction limited beam quality was achieved.
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Matthias Heinzig, Till Walbaum, Robert J. Williams, Ondrej Kitzler, Richard P. Mildren, Thomas Schreiber, Ramona Eberhardt, Andreas Tünnermann, "High-power single-pass pumped diamond Raman oscillator ", Proc. SPIE 10511, Solid State Lasers XXVII: Technology and Devices, 105111K (15 February 2018); doi: 10.1117/12.2287773; https://doi.org/10.1117/12.2287773
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