Journal
OPTICS EXPRESS
Volume 22, Issue 7, Pages 8069-8075Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.008069
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Funding
- Charm Engineering Inc (Korea)
- EPSRC [EP/H005412/1, EP/J008052/1]
- EPSRC [EP/H005412/1, EP/J008052/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/H005412/1, EP/J008052/1] Funding Source: researchfish
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We present the first multi-Watt demonstration of a diode pumped cryogenically cooled neodymium-doped yttrium aluminum garnet (YAG) laser operating at 946 nm on the F-4(3/2) -> I-4(9/2) transition. 3.8 W of continuous wave output power for 12.8 W of absorbed pump was obtained with a slope efficiency of 47%. In addition, we made an extensive characterization of the spectroscopic properties around the pump and laser wavelengths over the temperature range of 77 K to 300 K to find an increase of similar to 2.5 times for both the absorption and emission cross sections at the lowest temperature. (C) 2014 Optical Society of America
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