Radiation-balanced silica fiber laser [Elektronisk resurs]

• In optically pumped lasers, heat generated by the quantum defect causes detrimental fluctuations in the output mode, frequency, and power. Common heat-mitigation techniques use bulky mechanical coolers that introduce vibrations, leading to laser frequency and amplitude noise. Here, we present a radiation-balanced fiber laser, optically cooled by anti-Stokes fluorescence (ASF). The gain medium is a silica fiber with a 21-µm-diameter core doped with 2.06 wt. % Yb3+ and co-doped with Al2O3 and F- to reduce concentration quenching. The laser was core-pumped at 1040 nm to create both gain at 1065 nm and ASF cooling at atmospheric pressure. We demonstrate a maximum output power of 114 mW with a slope efficiency of 41% while maintaining near-zero average temperature change. This result could enable the development of fiber lasers with unprecedented coherence and stability. 

Ämnesord

Natural Sciences  (hsv)

Physical Sciences  (hsv)

Atom and Molecular Physics and Optics  (hsv)

Naturvetenskap  (hsv)

Fysik  (hsv)

Atom- och molekylfysik och optik  (hsv)

Genre

government publication  (marcgt)