On-chip erbium-ytterbium-co-doped lithium niobate microdisk laser with an ultralow threshold.
Opt Lett
; 48(13): 3447-3450, 2023 Jul 01.
Article
em En
| MEDLINE
| ID: mdl-37390152
ABSTRACT
Erbium-ion-doped lithium niobate (LN) microcavity lasers working in the communication band have attracted extensive attention recently. However, their conversion efficiencies and laser thresholds still have significant room to improve. Here, we prepared microdisk cavities based on erbium-ytterbium-co-doped LN thin film by using ultraviolet lithography, argon ion etching, and a chemical-mechanical polishing process. Benefiting from the erbium-ytterbium co-doping-induced gain coefficient improvement, laser emission with an ultralow threshold (â¼1 µW) and high conversion efficiency (1.8 × 10-3%) was observed in the fabricated microdisks under a 980-nm-band optical pump. This study provides an effective reference for improving the performance of LN thin-film lasers.
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Base de dados:
MEDLINE
Assunto principal:
Itérbio
/
Érbio
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article