Gretchen Phelps
Air Force Research Laboratory
15 Papers
36 Citations
Gretchen Phelps is an academic researcher from Air Force Research Laboratory. The author has contributed to research in topics: Atomic clock & Rubidium. The author has an hindex of 6, co-authored 15 publications. Previous affiliations of Gretchen Phelps include University of Kentucky.
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Papers
Compact Optical Atomic Clock Based on a Two-Photon Transition in Rubidium
Kyle W. Martin,Gretchen Phelps,Nathan D. Lemke,Matthew S. Bigelow,Benjamin Stuhl,Michael Wojcik,Michael Holt,Ian Coddington,Michael Bishop,John Burke +9 more
TL;DR: In this paper, an optical clock was proposed to improve the stability and power efficiency of the optical frequency standard for satellite navigation. But it is not suitable for use outside of a well-controlled laboratory environment, since it is often bulky, power-hungry, and inefficient.
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Compact Optical Atomic Clock Based on a Two-Photon Transition in Rubidium
Kyle W. Martin,Gretchen Phelps,Nathan D. Lemke,Matthew S. Bigelow,Benjamin Stuhl,Michael Wojcik,Michael Holt,Ian Coddington,Michael Bishop,John Burke +9 more
TL;DR: In this paper, an optical atomic clock, designed around a simple and manufacturable architecture, was presented, which utilizes the 778~nm two-photon transition in rubidium and yields fractional frequency instabilities of $3\times10−13/\sqrt{\tau (s)}$ for $\tau$ from 1~s to 10000~s.
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Frequency shifts due to Stark effects on a rubidium two-photon transition
Kyle W. Martin,Benjamin Stuhl,Jon Eugenio,Marianna Safronova,Marianna Safronova,Gretchen Phelps,John Burke,Nathan D. Lemke +7 more
TL;DR: In this article, the authors presented a rigorous calculation of the 778.1-nm ac Stark shift, which is in good agreement with our measured value of 2.30(4).
Compact Optical Clock with 5×10−13 Instability at 1 s
TL;DR: In this paper, a two-photon transition at 778 nm in rubidium was used to achieve a frequency instability of 5 x 10^-13 at 1 s. This was achieved by using commercial off-the-shelf components, making this system an attractive, appealing and competitive candidate to meet GPS-III spacecraft frequency stability requirements.
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A Sensitive Faraday Rotation Setup Using Triple Modulation
TL;DR: This paper presents a Faraday rotation method, using a new triple modulation technique, where the measurement of the Verdet constants of SF57 flint glass, pyrex glass, and air was tested, and the sensitivity obtained shows that this technique may be implemented in future cell wall characterization and thickness measurements.
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