| Autor: |
Topper B, Kuhn S, Neumann A, Albrecht AR, Flores AS, Hässner D, Hein S, Hupel C, Nold J, Haarlammert N, Schreiber T, Sheik-Bahae M, Mafi A |
| Jazyk: |
angličtina |
| Zdroj: |
Optics express [Opt Express] 2024 Jan 29; Vol. 32 (3), pp. 3660-3672. |
| DOI: |
10.1364/OE.507657 |
| Abstrakt: |
Laser cooling of a 5 cm long, 1 mm diameter ytterbium doped (6.56×10 25 ions/m 3 ) silica rod by 67 K from room temperature was achieved. For the pump source, a 100 W level ytterbium fiber amplifier was constructed along with a 1032 nm fiber Bragg grating seed laser. Experiments were done in vacuum and monitored with the non-contact differential luminescence thermometry method. Direct measurements of the absorption spectrum as a function of temperature were made, to avoid any possible ambiguities from site-selectivity and deviations from McCumber theory at low temperature. This allowed direct computation of the cooling efficiency versus temperature at the pump wavelength, permitting an estimated heat lift of 1.42 W/m as the sample cooled from ambient temperature to an absolute temperature of 229 K. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
|
