Investigating diamond Raman lasers at the 100 W level using quasi-continuous-wave pumping

Abstract

Quasi-cw pumping is used to investigate the high-power characteristics of cw beam conversion in diamond Raman lasers (DRLs). We show that thermal gradients establish in DRLs at approximately 50 μs for a 100 μm pump beam diameter, and thus that the steady state for cw operation can be reached within the 100–300 μs pulse duration of conventional quasi-cw pump laser technology. Using this approach, a steady-state on-time output power of 108 W was obtained from an external-cavity DRL during 250 μs pulses with 34% conversion efficiency. No thermal lens in the diamond was evident, showing excellent prospects for further power scaling.

© 2014 Optical Society of America

Continuous-wave wavelength conversion for high-power applications using an external cavity diamond Raman laser

Ondrej Kitzler, Aaron McKay, and Richard P. Mildren
Opt. Lett. 37(14) 2790-2792 (2012)

Continuous-wave diamond Raman laser

Walter Lubeigt, Gerald M. Bonner, Jennifer E. Hastie, Martin D. Dawson, David Burns, and Alan J. Kemp
Opt. Lett. 35(17) 2994-2996 (2010)

Large brightness enhancement for quasi-continuous beams by diamond Raman laser conversion

Zhenxu Bai, Robert J. Williams, Hadiya Jasbeer, Soumya Sarang, Ondrej Kitzler, Aaron Mckay, and Richard P. Mildren
Opt. Lett. 43(3) 563-566 (2018)

Quasi-continuous wave Raman lasers at 990 and 976  nm based on a three-level Nd:YLF laser

Dimitri Geskus, Jonas Jakutis Neto, Saara-Maarit Reijn, Helen M. Pask, and Niklaus U. Wetter
Opt. Lett. 39(10) 2982-2985 (2014)

302 W quasi-continuous cascaded diamond Raman laser at 1.5 microns with large brightness enhancement

Zhenxu Bai, Robert J. Williams, Ondrej Kitzler, Soumya Sarang, David J. Spence, and Richard P. Mildren
Opt. Express 26(16) 19797-19803 (2018)