Laser noise cancellation in single-cell CPT clocks

Published

July 1, 2008

Author(s)

Vladislav Gerginov, Svenja A. Knappe, V Shah, Leo W. Hollberg, John E. Kitching

Abstract

We demonstrate a new technique for the suppression of noise associated with the laser source in atomic clocks based on coherent population trapping. The technique uses differential detection of the transmission of linearly- and circularly-polarized beams propagating through different parts of a single rubidium vapor cell filled with a buffer gas mixture. The common-mode noise, associated with the laser frequency and amplitude noise, is suppressed by the differential detection of the two laser beams. The CPT signal, present only in the circularly polarized laser beam, is unaffected. The technique is simple and applicable in compact and chip-scale devices.

Citation

IEEE Transactions on Instrumentation and Measurement

Volume

57

Issue

7

Pub Type

Journals

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Keywords

atomic clock, chip-scale atomic clock, coherent population trapping, noise

Citation

Gerginov, V. , Knappe, S. , Shah, V. , Hollberg, L. and Kitching, J. (2008), Laser noise cancellation in single-cell CPT clocks, IEEE Transactions on Instrumentation and Measurement, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=50500 (Accessed April 29, 2024)