On-chip single-mode thin-film lithium niobate Fabry-Perot resonator laser based on Sagnac loop reflectors

Shupeng Yu; Zhiwei Fang; Zhe Wang; Yuan Zhou; Qinfen Huang; Jian Liu; Rongbo Wu; Haisu Zhang; Min Wang; Ya Cheng

doi:10.1364/OL.484387

On-chip single-mode thin-film lithium niobate Fabry-Perot resonator laser based on Sagnac loop reflectors

Opt Lett. 2023 May 15;48(10):2660-2663. doi: 10.1364/OL.484387.

Authors

Shupeng Yu, Zhiwei Fang, Zhe Wang, Yuan Zhou, Qinfen Huang, Jian Liu, Rongbo Wu, Haisu Zhang, Min Wang, Ya Cheng

PMID: 37186734
DOI: 10.1364/OL.484387

Abstract

We demonstrate an on-chip single-mode Er³⁺-doped thin-film lithium niobate (Er:TFLN) laser which consists of a Fabry-Perot (FP) resonator based on Sagnac loop reflectors (SLRs). The fabricated Er:TFLN laser has a footprint of 6.5 mm × 1.5 mm with a loaded quality (Q) factor of 1.6 × 10⁵ and a free spectral range (FSR) of 63 pm. We generate the single-mode laser at 1544 nm wavelength with a maximum output power of 44.7 µW and a slope efficiency of 0.18%.