Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)

Dual-Optical-Transition Modulation Transfer Spectroscopy Based on Ladder-Type Energy Structure

Jingming Chen, Jie Miao, Yuanchen Qi, Qiaohui Yang, Zhendong Chen, Duo Pan, Jingbiao Chen

Published May 12, 2025• 0 citations

Publisher

Abstract

Modulation transfer spectroscopy (MTS) provides a high-resolution, Doppler-free method for laser frequency stabilization, offering excellent signal-to-noise ratio and robustness, particularly suited for compact thermal atomic clocks. Extending this approach, dual-optical-transition MTS (DOT-MTS) enables the simultaneous stabilization of two optical transitions within a single atomic ensemble, paving the way for multi-wavelength frequency references in integrated systems. Despite its potential, DOT-MTS remains relatively unexplored. In this work, we demonstrate DOT-MTS in a ladder-type configuration using87Rb atoms. Both optical-optical double resonance (OODR) and double-resonance optical pumping (DROP) signals are clearly observed. Through systematic optimization of experimental parameters, the system achieves a self-evaluated short-term frequency stability at the 1E-13 level. These results demonstrate the feasibility of DOT-MTS as a high-performance, compact frequency reference and open a promising avenue toward the development of portable optical clocks.

DOI: 10.1109/eftf/ifcs64367.2025.11194348

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