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Intracavity-enhanced optical refrigeration of Yb:YLF crystal to cryogenic temperatures

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2015

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Ghasemkhani, Mohammadreza
Albrecht, Alexander R.
Melgaard, Seth D.
Cedeberg, Jeffrey G.
Sheik-Bahae, Mansoor

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https://doi.org/10.1117/12.2080343
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EPSTEIN, Richard I., ed. and others. Laser Refrigeration of Solids VIII. Bellingham, Washington: SPIE, 2015, 938003. Proceedings of SPIE. 9380. ISSN 0277-786X. ISBN 978-1-62841-470-7. Available under: doi: 10.1117/12.2080343

Zusammenfassung

Laser cooling of solids has great potential to achieve an all-solid-state optical cryo-cooler. The advantages of compactness, no vibrations, no moving parts or fluids, and high reliability have motivated intensive research. Increasing the pump power absorption is essential to reach lower temperatures. Here, using a high power broadly tunable InGaAs/GaAs vertical external-cavity surface-emitting laser (VECSEL) we demonstrate how we have increased the pump power absorption in an intra-cavity geometry cooling a 10% Yb:YLF crystal. We also discuss the progress, advantages, and challenges of laser cooling inside a VECSEL cavity, including the VECSEL active region design, cavity design, and cooling sample choice for optimal cooling. A novel method to increase the absorption of the pump power in the crystal has also been proposed.

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530 Physik

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Laser Refrigeration of Solids VIII, 11. Feb. 2015 - 12. Feb. 2015, San Francisco
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ISO 690GHASEMKHANI, Mohammadreza, Alexander R. ALBRECHT, Seth D. MELGAARD, Denis V. SELETSKIY, Jeffrey G. CEDEBERG, Mansoor SHEIK-BAHAE, 2015. Intracavity-enhanced optical refrigeration of Yb:YLF crystal to cryogenic temperatures. Laser Refrigeration of Solids VIII. San Francisco, 11. Feb. 2015 - 12. Feb. 2015. In: EPSTEIN, Richard I., ed. and others. Laser Refrigeration of Solids VIII. Bellingham, Washington: SPIE, 2015, 938003. Proceedings of SPIE. 9380. ISSN 0277-786X. ISBN 978-1-62841-470-7. Available under: doi: 10.1117/12.2080343
BibTex
@inproceedings{Ghasemkhani2015Intra-32429,
  year={2015},
  doi={10.1117/12.2080343},
  title={Intracavity-enhanced optical refrigeration of Yb:YLF crystal to cryogenic temperatures},
  number={9380},
  isbn={978-1-62841-470-7},
  issn={0277-786X},
  publisher={SPIE},
  address={Bellingham, Washington},
  series={Proceedings of SPIE},
  booktitle={Laser Refrigeration of Solids VIII},
  editor={Epstein, Richard I.},
  author={Ghasemkhani, Mohammadreza and Albrecht, Alexander R. and Melgaard, Seth D. and Seletskiy, Denis V. and Cedeberg, Jeffrey G. and Sheik-Bahae, Mansoor},
  note={Article Number: 938003}
}
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