Authors
Jia-Xiao Su, Xiang-Chuan Yan, Hai-Xia Li
Published in
The Review of scientific instruments. Volume 97. Issue 11. Nov 01, 2026.
Abstract
We present a simple, printed-circuit-board-based resonant electro-optic modulator (EOM) featuring a wide operational frequency range. By utilizing a low-loss, high-frequency variable capacitor, we can continuously tune the resonant frequency by typically 30% within a single band, e.g., from 161.0 to 233.5 MHz. Furthermore, by swapping a radio-frequency transformer, the EOM's resonance can be reconfigured across the 17.7-489.7 MHz range, with quality factors ranging from 46 to 109. Using this design, we demonstrate the EOM's applicability by generating strong 228 MHz sidebands to verify its utility for 6Li laser cooling and by locking a 780 nm laser to the Rb D2 transition using retroreflected modulation transfer spectroscopy at 20 MHz resonance. The device's reconfigurable wide frequency range and high-quality factors make this EOM versatile for laser cooling of multiple atomic species, including 6Li, 39K, and 41K, as well as for laser frequency locking. This design offers a flexible, robust, and practical solution for undergraduate-teaching laboratories and quantum optics research groups.
PMID:
43023920
Bibliographic data and abstract were imported from PubMed on 13 Nov 2026.
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