Field-programmable gate array based locking circuit for external cavity diode laser frequency stabilization

Schwettmann, Arne; Sedlacek, Jonathon; Shaffer, James P.
October 2011
Review of Scientific Instruments;Oct2011, Vol. 82 Issue 10, p103103
Academic Journal
We present a locking circuit for external cavity diode lasers implemented on a field-programmable gate array (FPGA). The main advantages over traditional non-FPGA-based locking circuits are rapid reconfigurability without any soldering and a friendly user interface. We characterize the lock quality by measuring the linewidth of a locked laser using electromagnetically induced transparency in a Rb vapor cell.


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