The sub-Doppler absorption laser spectroscopy at 728nm transition from the 5D5/2 state to the 6F state of cesium with linewidth near 10 MHz is first experimentally performed with indirect pumping from the ground state...The sub-Doppler absorption laser spectroscopy at 728nm transition from the 5D5/2 state to the 6F state of cesium with linewidth near 10 MHz is first experimentally performed with indirect pumping from the ground state 6S1/2 to the state 7P3/2 by a 455.5nm diode laser. Using a 455.5nm diode laser as an indirect pump laser, several excited states will be populated due to spontaneous decay from the 7P state. We first implement the sub-Doppler absorption laser spectroscopy at 728nm from the 5D5/2 state to the 6F state when Cs atoms within thermal glass cell decay to the 5D5/2 state. Due to velocity transfer effect, the hyperfine structure of 5D5/2 shows a mixed and complicated pattern but very e/ear structure when the 455.5nm pumping laser is counter-propagating （or co-propagating） with the 728nm probing laser.展开更多
Distributed Bragg reflector(DBR)lasers have found promising prospects in quantum sensing,cold atom physics,and precision spectroscopy.However,a broader implementation is challenged by their MHz-scale linewidths and th...Distributed Bragg reflector(DBR)lasers have found promising prospects in quantum sensing,cold atom physics,and precision spectroscopy.However,a broader implementation is challenged by their MHz-scale linewidths and the absence of autonomous atomic resonance alignment.Here,we demonstrate a turnkey 795 nm DBR laser system locked to the ^(85)Rb D_(1) hyperfine transition.Our approach employs a dual-stage architecture:stage 1 utilizes the Faraday anomalous dispersion optical filter(FADOF)with optical feedback,achieving automatic frequency resonance and confinement to the vicinity of the ^(85)Rb D_(1) line,while reducing the 1/integral linewidth from 461.8 kHz to 28.8 kHz,and the Lorentzian linewidth from 25.8 kHz to 426.9 Hz.This mechanism is quantitatively investigated using LangKobayashi equations.Stage 2 applies modulation transfer spectroscopy(MTS)to further stabilize the frequency of the optically locked laser,which yields an Allan deviation of 3.29×10^(-13)/√τ.Our system unlocks DBR lasers'potential in quantum precision measurements,offering a convenient,compact,low-noise light source for atomic clocks,magnetometers,and gyroscopes.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No 91436210
文摘The sub-Doppler absorption laser spectroscopy at 728nm transition from the 5D5/2 state to the 6F state of cesium with linewidth near 10 MHz is first experimentally performed with indirect pumping from the ground state 6S1/2 to the state 7P3/2 by a 455.5nm diode laser. Using a 455.5nm diode laser as an indirect pump laser, several excited states will be populated due to spontaneous decay from the 7P state. We first implement the sub-Doppler absorption laser spectroscopy at 728nm from the 5D5/2 state to the 6F state when Cs atoms within thermal glass cell decay to the 5D5/2 state. Due to velocity transfer effect, the hyperfine structure of 5D5/2 shows a mixed and complicated pattern but very e/ear structure when the 455.5nm pumping laser is counter-propagating （or co-propagating） with the 728nm probing laser.
基金National Natural Science Foundation of China(62405007)Innovation Program for Quantum Science and Technology(2021ZD0303200)+3 种基金China Postdoctoral Science Foundation(BX2021020)Wenzhou Major Science and Technology Innovation Key Project(ZG2020046)Hebei Provincial Natural Science Foundation Basic Research Special Project-2025 Basic Research Program Proof-ofConcept Project(F2025109009)Wenzhou Science&Technology Bureau(ZG2023021)。
文摘Distributed Bragg reflector(DBR)lasers have found promising prospects in quantum sensing,cold atom physics,and precision spectroscopy.However,a broader implementation is challenged by their MHz-scale linewidths and the absence of autonomous atomic resonance alignment.Here,we demonstrate a turnkey 795 nm DBR laser system locked to the ^(85)Rb D_(1) hyperfine transition.Our approach employs a dual-stage architecture:stage 1 utilizes the Faraday anomalous dispersion optical filter(FADOF)with optical feedback,achieving automatic frequency resonance and confinement to the vicinity of the ^(85)Rb D_(1) line,while reducing the 1/integral linewidth from 461.8 kHz to 28.8 kHz,and the Lorentzian linewidth from 25.8 kHz to 426.9 Hz.This mechanism is quantitatively investigated using LangKobayashi equations.Stage 2 applies modulation transfer spectroscopy(MTS)to further stabilize the frequency of the optically locked laser,which yields an Allan deviation of 3.29×10^(-13)/√τ.Our system unlocks DBR lasers'potential in quantum precision measurements,offering a convenient,compact,low-noise light source for atomic clocks,magnetometers,and gyroscopes.
