Dynamics in a 1.2 kW quasi-continuous-wave diamond Raman laser with low-coherence pumping (Conference Presentation)
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2019-03-13 |
| Authors | Sergei Antipov, Richard P. Mildren, Alexander Sabella, Robert J. Williams, David J. Spence |
| Institutions | Macquarie University, Defence Science and Technology Group |
Abstract
Section titled āAbstractāA quasi-continuous-wave external cavity diamond Raman laser with 1.2 kW output power was demonstrated using gated pump pulses of 100 Āµs duration, which was 7 times longer than the time constant for the establishment of steady-state temperature gradients. An 83% slope efficiency and a 53% optical-to-optical efficiency were obtained in conversion from a 1.064 Āµm Nd:YAG pump to a 1.24 Āµm first Stokes. The transient Stokes behavior from the sharp turn-on was consistent with calculations for the first Stokes build-up time. A brightness enhancement factor of 56 was obtained from the M2 = 15 pump beam. An observed increase in the first Stokes beam quality from M2 = 2.95 to M2 = 1.25 with increase of the Raman laser output power indicated the presence of a steady-state thermal lens in diamond.