Microdisk lasers on an erbium-doped lithium-niobite chip

Lithium niobate on insulator (LNOI) provides a platform for the fundamental physics investigations and practical applications of integrated photonics. However, as an indispensable building block of integrated photonics, lasers are in short supply. In this paper, erbium-doped LNOI laser in the 1550-nm band was demonstrated in microdisk cavities with high quality factors fabricated in batches by UV exposure, inductively coupled plasma reactive ion etching, and chemomechanical polishing. The threshold and conversion efficiency of the erbium-doped LNOI microdisk laser were measured to be lower than 1 mW and 6.5x10(-5)%, respectively. This work will benefit the development of integrated photonics based on LNOI.

Automated summary

As a crucial building block in integrated photonics, lasers are in short supply. This paper demonstrates an erbium-doped LNOI laser with high performance in the 1550-nm band utilizing microdisk cavities. The threshold and conversion efficiency of the laser are measured to be lower than 1 mW and 6.5x10(-5)%, respectively, benefiting the development of integrated photonics based on LNOI.