Highly matched and precisely locked to the absorption lines of rubidium(Rb)atoms,780 nm lasers play a crucial role in fields such as quantum computing,precision measurements,and high-sensitivity sensing,with clear req...Highly matched and precisely locked to the absorption lines of rubidium(Rb)atoms,780 nm lasers play a crucial role in fields such as quantum computing,precision measurements,and high-sensitivity sensing,with clear requirements for strong coherence and fast tunability.In this paper,based on the self-injection locking and ultra-high quality factor whispering gallery mode(WGM)cavity,a 780 nm narrow linewidth(23.8 kHz)tunable laser with a single longitudinal mode output is verified.More importantly,benefiting from the optimized combined coupling coefficient K and via the lithium niobate electro-optic effect,the laser frequency detuning is ef⁃fectively improved,with the experimental tuning range reaching 110 pm and the tuning efficiency of 6.4 pm/V.This work provides a high-performance design solution for fast-tunable narrow-linewidth lasers for applications in the near-infrared range,which is expected to play an essential role in the future.展开更多
基金Supported by the General Program of National Natural Science Foundation of China(62373331)the Joint Funds of the National Natural Science Foundation of China(U21A20141)+1 种基金the Innovative Research Group Project of the National Natural Science Foundation of China(51821003)the Natural Science Foundation of Shanxi Province(202403021211095).
文摘Highly matched and precisely locked to the absorption lines of rubidium(Rb)atoms,780 nm lasers play a crucial role in fields such as quantum computing,precision measurements,and high-sensitivity sensing,with clear requirements for strong coherence and fast tunability.In this paper,based on the self-injection locking and ultra-high quality factor whispering gallery mode(WGM)cavity,a 780 nm narrow linewidth(23.8 kHz)tunable laser with a single longitudinal mode output is verified.More importantly,benefiting from the optimized combined coupling coefficient K and via the lithium niobate electro-optic effect,the laser frequency detuning is ef⁃fectively improved,with the experimental tuning range reaching 110 pm and the tuning efficiency of 6.4 pm/V.This work provides a high-performance design solution for fast-tunable narrow-linewidth lasers for applications in the near-infrared range,which is expected to play an essential role in the future.
