A digital optical phase lock loop(OPLL)is implemented to synchronize the frequency and phase between two external cavity diode lasers(ECDL),generating Raman pulses for atom interferometry.The setup involves all-digita...A digital optical phase lock loop(OPLL)is implemented to synchronize the frequency and phase between two external cavity diode lasers(ECDL),generating Raman pulses for atom interferometry.The setup involves all-digital phase detection and a programmable digital proportional-integral-derivative(PID)loop in locking.The lock generates a narrow beat-note linewidth below 1 Hz and low phase-noise of 0.03 rad2 between the master and slave ECDLs.The lock proves to be stable and robust,and all the locking parameters can be set and optimized on a computer interface with convenience,making the lock adaptable to various setups of laser systems.展开更多
基金by National Natural Science Foundation of China(60925022 and 10804097)the Research Fund for the Doctoral Program of Higher Education of China(20090101120009)the Fundamental Research Funds for the Central Universities(2010QNA3024)。
文摘A digital optical phase lock loop(OPLL)is implemented to synchronize the frequency and phase between two external cavity diode lasers(ECDL),generating Raman pulses for atom interferometry.The setup involves all-digital phase detection and a programmable digital proportional-integral-derivative(PID)loop in locking.The lock generates a narrow beat-note linewidth below 1 Hz and low phase-noise of 0.03 rad2 between the master and slave ECDLs.The lock proves to be stable and robust,and all the locking parameters can be set and optimized on a computer interface with convenience,making the lock adaptable to various setups of laser systems.
