Journal
OPTICS EXPRESS
Volume 22, Issue 3, Pages 3325-3333Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.003325
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Funding
- Australian Research Council Linkage Project [LP110200545]
- M Squared Lasers Ltd
- Macquarie University iMQRES scholarship
- Australian Research Council [LP110200545] Funding Source: Australian Research Council
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We present a highly efficient picosecond diamond Raman laser synchronously-pumped by a 4.8 W mode-locked laser at 1064 nm. A ring cavity was adopted for efficient operation. With a low-Q cavity for first-Stokes 1240 nm, we have achieved 2.75 W output power at 1240 nm with 59% overall conversion efficiency. The slope efficiency tended towards 76% far above the SRS threshold, approaching the SRS quantum limit for diamond. A high-Q first-Stokes cavity was employed for second-Stokes 1485 nm generation through the combined processes of four-wave mixing and single-pass stimulated Raman scattering. Up to 1.0 W of second-stokes at 1485 nm was obtained, corresponding to 21% overall conversion efficiency. The minimum output pulse duration was compressed relative to the 15 ps pump, producing pulses as short as 9 ps for 1240 nm and 6 ps for 1485 nm respectively. (C) 2014 Optical Society of America
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