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Stimulated Raman Clock Transition Without a Differential ac Stark Shift

Ji Yeon Kim, D. Cho

Journal of the Korean Physical SocietyNov 1, 20008 citations

Performance of a Microwave Clock Based on a Laser-Induced Stimulated Raman Interactions

Philip Hemmer, Shaoul Ezekiel, C. C. Leiby

Recent experimental work1 has demonstrated that a microwave oscillator can be stabilized using a stimulated-resonance Raman transition in a sodium atomic beam. This Raman technique is of interest because optical lasers rather than microwaves are used in the interaction, and, aside from fundamental interest, the greater flexibility of optical systems may make it possible eventually to develop more-stable and moreportable atomic clocks.

Jun 18, 19842 citations

Phase-sensitive optical spectroscopy of a laser-cooled, microwave atomic clock

Rachel Elvin

Jan 1, 20200 citations

Stimulated Raman Spectroscopy with a Modulated External Cavity Diode Laser

C. S. Wood, S. C. Bennett, Doyoun Cho +1 more

The usefulness of stimulated Raman transitions has been demonstrated in a variety of different applications. These two-photon transitions have the capability of very high resolution because the transition linewidths depend on the relative jitter between two frequencies, rather than absolute jitter on either one. Recent demonstrations include laser cooling and atomic interferometry [1]. They may also be needed for improved atomic clocks [2]. Due to this high resolution, stimulated Raman transitions can be a direct replacement for a microwave cavity and are often more compatible with optical experiments because a laser beam requires less space.The usefulness of stimulated Raman transitions has been demonstrated in a variety of different applications. These two-photon transitions have the capability of very high resolution because the transition linewidths depend on the relative jitter between two frequencies, rather than absolute jitter on either one. Recent demonstrations include laser cooling and atomic interferometry [1]. They may also be needed for improved atomic clocks [2]. Due to this high resolution, stimulated Raman transitions can be a direct replacement for a microwave cavity and are often more compatible with optical experiments because a laser beam requires less space.

Semiconductor Lasers: Advanced Devices and ApplicationsJan 1, 19950 citations

Quantum-enhanced stimulated Raman scattering

Rayssa Bruzaca de Andrade, Tobias Gehring, Ulrik L. Andersen

Elsevier eBooksJan 1, 20220 citations

Precision studies of stimulated-resonance Raman interactions in an atomic beam

Philip Hemmer, G. P. Ontai, Shaoul Ezekiel

Precision studies of stimulated-resonance Raman interactions in a sodium atomic beam were performed with emphasis on Ramsey’s separated-field excitation. Ramsey fringes were obtained for a field separation of up to 30 cm, and the data were consistent with theoretical predictions. Possible applications of this Raman interaction to clock development also were studied by stabilizing a microwave oscillator to a Raman–Ramsey fringe. The resulting oscillator stability of 1.5 × 10−11 for a 1000-sec averaging time compares favorably with commercial cesium clocks when differences in atom transit time and transition frequency are taken into consideration. Finally, potential sources of long-term frequency error, which are important for clock applications, were also partially investigated.Precision studies of stimulated-resonance Raman interactions in a sodium atomic beam were performed with emphasis on Ramsey’s separated-field excitation. Ramsey fringes were obtained for a field separation of up to 30 cm, and the data were consistent with theoretical predictions. Possible applications of this Raman interaction to clock development also were studied by stabilizing a microwave oscillator to a Raman–Ramsey fringe. The resulting oscillator stability of 1.5 × 10−11 for a 1000-sec averaging time compares favorably with commercial cesium clocks when differences in atom transit time and transition frequency are taken into consideration. Finally, potential sources of long-term frequency error, which are important for clock applications, were also partially investigated.

Journal of the Optical Society of America BFeb 1, 198655 citations

Performance of a microwave clock based on a laser-induced stimulated Raman interaction (A)

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Performance of a microwave clock based on a laser-induced stimulated Raman interaction (A)

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