Electrically driven compact hybrid lithium niobate microring laser

TL;DR

This paper reports the development of a compact, electrically driven hybrid lithium niobate microring laser with single mode emission at 1531 nm, demonstrating potential for integrated photonics applications.

Contribution

It introduces a novel hybrid lithium niobate microring laser integrated with a commercial pump diode, achieving single mode lasing in a compact chip.

Findings

Lasing at 1531 nm with a linewidth of 0.05 nm

Threshold pump power of 6 mW and current of 0.5 A

Compact size of 3 mm x 4 mm x 0.5 mm

Abstract

We demonstrate an electrically driven compact hybrid lithium niobate microring laser by butt coupling a commercial 980-nm pump laser diode chip with a high quality Er3+-doped lithium niobate microring chip. Single mode lasing emission at 1531 nm wavelength from the Er3+-doped lithium niobate microring can be observed with the integrated 980-nm laser pumping. The compact hybrid lithium niobate microring laser occupies the chip size of 3 mmx4mmx0.5 mm. The threshold pumping laser power is 6 mW and the threshold current is 0.5 A (operating voltage 1.64 V) in the atmospheric temperature. The spectrum featuring single mode lasing with small linewidth of 0.05 nm is observed. This work explores a robust hybrid lithium niobate microring laser source which has potential applications in coherent optical communication and precision metrology.