Energy Scaling, Second Stokes Oscillation, and Raman Gain-Guiding in Monolithic Diamond Raman Lasers
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2018-10-11 |
| Journal | IEEE Journal of Quantum Electronics |
| Authors | Vasili G. Savitski, Giorgos Demetriou, Sean Reilly, Hangyu Liu, Erdan Gu |
| Institutions | University of Strathclyde |
| Citations | 3 |
Abstract
Section titled āAbstractāEnergy scaling of the first Stokes oscillation is compared in micro-lensed and plane-plane monolithic diamond Raman lasers under 532-nm pumping. A maximum Raman pulse energy of 92 Ī¼J at 573 nm was achieved with the micro-lensed device, whereas in a plane-plane configuration, the maximum Raman pulse energy was 3.1 mJ. The second Stokes generation at 620 nm in 2 and 1 mm long micro-lensed monolithic diamond Raman lasers is also reported. The best conversion efficiency from the pump at 532 nm, namely, 63%, was observed in a 2 mm long crystal at the pump pulse intensity of 4.5 GW/cm <sup xmlns:mml=āhttp://www.w3.org/1998/Math/MathMLā xmlns:xlink=āhttp://www.w3.org/1999/xlinkā>2</sup> . By measuring the output Raman laser beam caustic, it was found that the second Stokes intracavity beam radius at the output coupler of the micro-lensed device is at least two times smaller than that expected from the ABCD matrix calculations of the resonator mode. A Raman gain-guiding mechanism is suggested to explain this difference.