1. Research
  2. Publications
  3. Compact plug and play optical ...


Find scientific contributions

to conferences also on our events page.

Compact plug and play optical frequency reference device based on Doppler-free spectroscopy of rubidium vapor

A. Strangfeld1,2, B. Wiegand1, J. Kluge1,2, M. Schoch1, and M. Krutzik1,2

Published in:

Opt. Express, vol. 30, no. 7, pp. 12039-12047, doi:10.1364/OE.453942 (2022).


Compactness, robustness and autonomy of optical frequency references are prerequisites for reliable operation in mobile systems, on ground as well as in space. We present a standalone plug and play optical frequency reference device based on frequency modulation spectroscopy of the D2-transition in rubidium at 780 nm. After a single button press the hand-sized laser module, based on the micro-integrated laser-optical bench described in [J. Opt. Soc. Am. B 38, 1885 (2021)], works fully autonomous and generates 6 mW of frequency stabilized light with a relative frequency instability of 1.4×10-12 at 1 s and below 10-11 at 105 s averaging time. We describe the design of the device, investigate the thermal characteristics affecting the output frequency and demonstrate short-term frequency stability improvement by a Bayesian optimizer varying the modulation parameters.

1 Department of Physics, Humboldt-Universität zu Berlin, Newtonstraße 15, 12489 Berlin, Germany
2 Ferdinand-Braun-Institut (FBH), Gustav-Kirchhoff-Str. 4, 12489 Berlin, Germany

Copyright © 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement.

Full version in pdf-format.