Optical frequency reference stabilized to Rb D2 transition controlled by FPGA lock-in module
M. Luda, J. Codnia
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Base Information
Volume
V51 - N1 / 2018 Ordinario
Reference
49037:1-11
DOI
http://doi.org/10.7149/OPA.51.1.49037
Language
English
Keywords
ECDL, lock-in, Rubidium.
Abstract
Lock-in measurement is frequently used for tunable laser wavelength stabilization in metrology, spectroscopy atomic physics and quantum optics labs. In particular, wavelength stabilization to atomic transitions is used to build optical frequency references. In this work we present the development of a stabilization module build using FPGA (Field Programmable Gate Array) technology for modulating at f frequency and lock-in demodulating on f and 3f frequencies. The module is economic, versatile and can be remotely controlled using a Free Software platform. We tested the system performance stabilizing a tunable External Cavity Diode Laser (ECDL) to a Rubidium (Rb) hyperfine transition, achieving an optical frequency standard deviation of 100 kHz, equivalent to an stability of 2.6 10-10.
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