Local internal and bulk optical cooling in Nd-doped crystals and nanocrystalline powders revisited

Angel J. Garcia-Adeva; Rolindes Balda; Mohammed Al Saleh; Sara Garcia-Revilla; Joaquin Fernandez

doi:10.1117/12.875140

9 February 2011 Local internal and bulk optical cooling in Nd-doped crystals and nanocrystalline powders revisited

Angel J. Garcia-Adeva, Rolindes Balda, Mohammed Al Saleh, Sara Garcia-Revilla, Joaquin Fernandez

Proceedings Volume 7951, Laser Refrigeration of Solids IV; 795106 (2011) https://doi.org/10.1117/12.875140
Event: SPIE OPTO, 2011, San Francisco, California, United States

Abstract

In the present work, we report on infrared thermography measurements in Nd-doped KPb₂Cl₅ crystal and powder above and below the barycentre of the ⁴F_3/2 level that were performed in order to assess the relative weights of both the direct anti-Stokes absorption processes and those assisted by either excited state absorption or energy transfer upconversion when cooling takes place in the material. As the laser induced temperature changes are usually small, we used a special configuration of the samples that allowed us to obtain differential measurements where an undoped sample acted as a temperature baseline. This method allows us to ascertain whether the recorded temperature changes are optically induced or they are due to some other effect.

Citation Download Citation

Angel J. Garcia-Adeva, Rolindes Balda, Mohammed Al Saleh, Sara Garcia-Revilla, and Joaquin Fernandez "Local internal and bulk optical cooling in Nd-doped crystals and nanocrystalline powders revisited", Proc. SPIE 7951, Laser Refrigeration of Solids IV, 795106 (9 February 2011); https://doi.org/10.1117/12.875140

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available