摘要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.
Abstract：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.
WANG Xiao-Long;TAO Tian-Jiong;CHENG Bing;WU Bin;XU Yun-Fei;WANG Zhao-Ying;LIN Qiang**
. A Digital Phase Lock Loop for an External Cavity Diode Laser[J]. 中国物理快报, 2011, 28(8): 84214-084214.
WANG Xiao-Long, TAO Tian-Jiong, CHENG Bing, WU Bin, XU Yun-Fei, WANG Zhao-Ying, LIN Qiang**
. A Digital Phase Lock Loop for an External Cavity Diode Laser. Chin. Phys. Lett., 2011, 28(8): 84214-084214.
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