High-power single-pass pumped diamond Raman oscillator
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-02-15 |
| Authors | Matthias Heinzig, Till Walbaum, OndÅej Kitzler, Richard P. Mildren, Thomas Schreiber |
| Institutions | Fraunhofer Institute for Applied Optics and Precision Engineering, Friedrich Schiller University Jena |
Abstract
Section titled āAbstractāWe present our recent advances on power scaling of a high-power single-pass pumped CVD-diamond Raman oscillator at 1.2 Ī¼m. 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.