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19 February 2014 Intracavity optical refrigeration to 131K using high-power vertical external-cavity surface-emitting lasers (VECSELs)
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Proceedings Volume 9000, Laser Refrigeration of Solids VII; 900005 (2014) https://doi.org/10.1117/12.2040116
Event: SPIE OPTO, 2014, San Francisco, California, United States
Abstract
Laser cooling of Yb:YLF crystal to 131 K from room temperature has been demonstrated in an active intracavity arrangement for enhanced pump absorption. The laser is a high-power, broadly-tunable InGaAs/GaAs MQW VECSEL capable of producing 20 Watts at 1020 nm, directly at the E4-E5 transition of the Yb-ion. This is the coldest temperature achieved to date in an intracavity geometry and without sophisticated heat load management of the crystal. This progress presents a significant advancement towards an all-solid-state compact cryocooler.
© (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mohammadreza Ghasemkhani, Alexander R. Albrecht, Seth D. Melgaard, Denis V. Seletskiy, Jeffrey G. Cedeberg, and Mansoor Sheik-Bahae "Intracavity optical refrigeration to 131K using high-power vertical external-cavity surface-emitting lasers (VECSELs)", Proc. SPIE 9000, Laser Refrigeration of Solids VII, 900005 (19 February 2014); https://doi.org/10.1117/12.2040116
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