Advances in laser cooling of Tm:YLF crystals (Conference Presentation)

Saeid Rostami; Alexander R. Albrecht; Mauro Tonelli; Mansoor Sheik-Bahae

doi:10.1117/12.2254656

20 April 2017 Advances in laser cooling of Tm:YLF crystals (Conference Presentation)

Saeid Rostami, Alexander R. Albrecht, Mauro Tonelli, Mansoor Sheik-Bahae

Author Affiliations +

Proceedings Volume 10121, Optical and Electronic Cooling of Solids II; 1012105 (2017) https://doi.org/10.1117/12.2254656
Event: SPIE OPTO, 2017, San Francisco, California, United States

Abstract

We investigate high power laser cooling in Tm:YLF crystals both in ambient pressure and high vacuum. For this purpose, we have constructed a high power CW OPO broadly tunable from 1755 nm to 2000 nm. By using this tunable source, laser cooling for (3 mm3) 1% doped Tm:YLF crystal was observed from 1801 nm to 2000 nm. Cooling efficiency of the sample, external quantum efficiency (EQE), background absorption and optimum laser cooling wavelength are extracted from laser induced temperature modulation spectrum (LITMoS) test on the cooling sample. To improve cooling performance, we have designed multiple pass non-resonant cavities to maximize the absorption of the laser light inside the sample. We setup multiple pass cavities in a high vacuum chamber to reduce convective heat load and enhance laser cooling results.

Conference Presentation

Citation Download Citation

Saeid Rostami, Alexander R. Albrecht, Mauro Tonelli, and Mansoor Sheik-Bahae "Advances in laser cooling of Tm:YLF crystals (Conference Presentation)", Proc. SPIE 10121, Optical and Electronic Cooling of Solids II, 1012105 (20 April 2017); https://doi.org/10.1117/12.2254656

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