| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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A Digital Phase Lock Loop for an External Cavity Diode Laser |
| WANG Xiao-Long, TAO Tian-Jiong, CHENG Bing, WU Bin, XU Yun-Fei, WANG Zhao-Ying, LIN Qiang**
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Institute of Optics, Zhejiang University, Hangzhou 310027
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| Cite this article: |
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WANG Xiao-Long, TAO Tian-Jiong, CHENG Bing et al 2011 Chin. Phys. Lett. 28 084214 |
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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.
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| Keywords:
42.55.Px
42.60.-v
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Received: 20 April 2011
Published: 28 July 2011
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| PACS: |
42.55.Px
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(Semiconductor lasers; laser diodes)
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42.60.-v
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(Laser optical systems: design and operation)
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