Publication of the journal

The coherent population trapping (CPT) resonance studies suppose that laser wavelength is set at absorption peak of a cell. However, in this case the maximum amplitude of quantum frequency discriminator is not reached and even slight deviation in laser wavelength can quintuple the CPT efficiency. Dependences of CPT resonance frequency, amplitude and slope of CPT-based quantum discriminator on laser wavelength are significant but understudied. Thus their experimental study is promising. In this work, possible operating modes of Cs cells are studied upon development of miniature frequency standard with body volume less than 50 cm3. The Cs cells under study have different gas composition and pressure and are made using various fabrication techniques. It has been established that all studied cells have minimal CPT resonance frequency at laser wavelength that is slightly longer than at absorption peak. A construction design of development prototype of quantum frequency standard with power spatial layout of electronic boards in the form of a “box” inside which a shielded thermostat with a gas quantum cell is placed, is described. It was shown that small size of electronic boards with soldered joints on perimeter guarantees against low-frequency flexural vibration modes and ensures high mechanical performance at possible accelerations of quantum frequency standard.

• Key words: coherent population trapping, CPT, Cs cell, wavelength, frequency extremum, frequency stability, electronics layout
• Published in: INTEGRATED RADIOELECTRONIC DEVICES
• Bibliography link: Kurchanov A. F., Slyusarev S. N., Ovchinnikov S. N., Salnikov A. S. Miniature frequency standard based on CPT in Cs. Proc. Univ. Electronics, 2023, vol. 28, no. 5, pp. 649–658. https://doi.org/ 10.24151/1561-5405-2023-28-5-649-658. – EDN: MJZGFB.
• Financial source: Acknowledgments: the authors thank D. A. Parekhin for insightful recommendations at the research methods discussions, and A. N. Nukraev for help in preparing the component parts of the standard layout draws