Versatile Digital GHz Phase Lock for External Cavity Diode Lasers

Details Versatile Digital GHz Phase Lock for External Cavity Diode Lasers Versatile Digital GHz Phase Lock for External Cavity Diode Lasers

2008-09-22

arxiv.org/abs/0809.3607v3

Measur.Sci.Tech.20:055302,2009

Physics

Quantum Physics

4.5 pages, 5 figures v3: fixed error in schematic: R10 connects to other end of C4

Scientific paper

10.1088/0957-0233/20/5/055302

We present a versatile, inexpensive and simple optical phase lock for applications in atomic physics experiments. Thanks to all-digital phase detection and implementation of beat frequency pre-scaling, the apparatus requires no microwave-range reference input, and permits phase locking at frequency differences ranging from sub-MHz to 7 GHz (and with minor extension, to 12 GHz). The locking range thus covers ground state hyperfine splittings of all alkali metals, which makes this system a universal tool for many experiments on coherent interaction between light and atoms.

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