Laser cooling of a Yb doped silica fiber by 18 Kelvin from room temperature.
Opt Lett
; 46(22): 5707-5710, 2021 Nov 15.
Article
in En
| MEDLINE
| ID: mdl-34780442
ABSTRACT
An ytterbium doped silica optical fiber with a core diameter of 900µm has been cooled by 18.4 K below ambient temperature by pumping with 20 W of 1035 nm light in vacuum. In air, cooling by 3.6 K below ambient was observed with the same 20 W pump. The temperatures were measured with a thermal imaging camera and differential luminescence thermometry. The cooling efficiency is calculated to be 1.2±0.1%. The core of the fiber was codoped with Al3+ for an Al to Yb ratio of 61, to allow for a larger Yb concentration and enhanced laser cooling.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Opt Lett
Year:
2021
Document type:
Article