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High-power single-pass pumped diamond Raman oscillator

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

:

Hartl, I. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XV: Technology and Systems 2018 : 29 January - 1 February 2018, San Francisco, California
Bellingham, WA: SPIE, 2018 (Proceedings of SPIE 10512)
ISBN: 978-1-5106-1509-0
ISBN: 978-1-5106-1510-6
Paper 105120G, 6 pp.
Conference "Fiber Lasers - Technology and Systems <15, 2018, San Francisco/Calif.>
English
Conference Paper
Fraunhofer IOF ()

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.

: http://publica.fraunhofer.de/documents/N-520620.html