Investigation and exploitation of anomalously fast heat dissipation in diamond
Abstract
Demonstrated diamond Raman lasers output powers are currently more than five times higher than the calculate thermal limit indicating an anomalous mechanism at play at high power loadings. The nature of the mechanism, and the extent to which it will enable higher thermally-unaffected output, are not well understood. This project aims to elucidate the beam generation at extreme power loadings, with specific attention to be focused on the dynamics of phonons responsible for heat transport. Spatio-temporal phonon populations will be measured using vibronic phonon spectroscopy (VPS) to reveal the kinetics of phonon dissipation from the laser active region and thus their role in determining the temperature profile.The new thermal models will be validated, at least in part, by demonstrating a direct-diode pumped diamond Raman laser powers and laser powers up to 10 kW. The results will be critical for predicting the thermal and optical behaviour of power-scaled diamond Raman lasers and with potential broader impact in technologies outside lasers.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 24, 2019
- Source ID
- FA23861814117
Entities
People
- Richard P. Mildren
Organizations
- Air Force Office of Scientific Research
- Macquarie University
- United States Air Force