1. Simple, highly-stable transfer cavity for laser stabilization based on a carbon-fiber reinforced polymer spacer
- Author
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Zwettler, Timo, Xue, Zeyang, Bolognini, Gaia, Bühler, Tabea, Hruby, Lorenz, Fabre, Aurélien, Donner, Tobias, and Brantut, Jean-Philippe
- Subjects
Physics - Atomic Physics ,Physics - Instrumentation and Detectors ,Physics - Optics - Abstract
We describe the design and operation of a high-stability Fabry-Perot cavity, for laser stabilization in cavity quantum-electrodynamics experiments. Our design is based on an inexpensive and readily available uniaxial carbon-fiber reinforced polymer tube spacer, featuring an ultra-low thermal expansion coefficient. As a result, our $136\mathrm{mm}$-long cavity, which has a finesse of ${5160}$, shows a coefficient of thermal expansion of $1.6 \times 10^{-6}~\mathrm{K}^{-1}$. Enclosing it in a hermetic chamber at room-pressure and using a simple temperature stabilization, we observe absolute frequency excursions over a full day below $50~\mathrm{MHz}$ for a laser operating at $446.785\mathrm{THz}$. The frequency stability is limited by the imperfect thermal isolation from the environment and can be corrected using a built-in piezo-electric actuator. In addition, we discuss a different variant of this design and identify future improvements. Our system provides a cost-effective and robust solution for transferring laser stability over different wavelengths, as well as for linewidth reduction or spectral filtering of CW laser sources for applications in quantum science., Comment: 5 pages, 4 figures
- Published
- 2024