摘要
Microcavity lasers based on erbium-doped lithium niobate on insulator(LNOI),which are key devices for LNOI integrated photonics,have attracted significant attention recently.In this study,we report the realization of a C-band single-mode laser using the Vernier effect in two coupled erbium-doped LNOI microrings with different radii under the pump of a 980-nm continuous laser.The laser,operating stably over a large range of pumping power,has a pump threshold of about 200μW and a side-mode suppression ratio exceeding 26 dB.The high-performance LNOI single-mode laser will promote the development of lithium niobate integrated photonics.
基金
the National Key Research and Development Program of China(Grant No.2019YFA0705000)
the National Natural Science Foundation of China(Grant Nos.12034010,11734009,92050111,12074199,92050114,12004197,and 1774182)
the 111 Project(Grant No.B07013).
