aqora

Ultra-Small Atomic Clocks based on Coherent Population Trapping and Micromachined Vapor Cells

John E. Kitching, Svenja A. Knappe, Li‐Anne Liew +5 more

Jan 1, 20030 citations

Advances in Coherent Population Trapping for Atomic Clocks

Vishal Shah, John E. Kitching

Advances in atomic, molecular, and optical physicsJan 1, 201080 citations

Cs vapor microcells with Ne-He buffer gas mixture for high operation-temperature miniature atomic clocks

Eric Kroemer, Moustafa Abdel Hafiz, Vincent N. Maurice +3 more

We report on the characterization of Cs vapor microfabricated cells filled with a Ne-He buffer gas mixture using coherent population trapping (CPT) spectroscopy. The temperature dependence of the Cs clock frequency is found to be canceled at the first order around a so-called inversion temperature higher than 80°C whose value depends on the buffer gas partial pressure ratio. This buffer gas mixture could be well-adapted for the development of miniature atomic clocks devoted to be used in specific applications such as defense and avionic systems with high operating temperature environment (typically higher than 85°C). This solution suggests an alternative to buffer gas mixtures generally used in optically-pumped vapor cell atomic clocks.We report on the characterization of Cs vapor microfabricated cells filled with a Ne-He buffer gas mixture using coherent population trapping (CPT) spectroscopy. The temperature dependence of the Cs clock frequency is found to be canceled at the first order around a so-called inversion temperature higher than 80°C whose value depends on the buffer gas partial pressure ratio. This buffer gas mixture could be well-adapted for the development of miniature atomic clocks devoted to be used in specific applications such as defense and avionic systems with high operating temperature environment (typically higher than 85°C). This solution suggests an alternative to buffer gas mixtures generally used in optically-pumped vapor cell atomic clocks.

Optics ExpressJul 7, 201516 citations

Optimization of Light Frequency Shift Characteristics for Coherent Population Trapping Atomic Clock

张艳 Zhang Yan, 张奕 Zhang Yi, 尹毅 Yin Yi +2 more

Chinese Journal of LasersJan 1, 20140 citations

Characterizing passive coherent population trapping resonance in a cesium vapor cell filled with neon buffer gas

Zhi Liu, Jieying Wang, Wen-Ting Diao +2 more

We present a pair of phase-locked lasers with a 9.2-GHz frequency difference through the injection locking of a master laser to the RF-modulation sideband of a slave diode laser. Using this laser system, a coherent population trapping (CPT) signal with a typical linewidth of ∼ 182 Hz is obtained in a cesium vapor cell filled with 30 Torr (4 kPa) of neon as the buffer gas. We investigate the influence of the partial pressure of the neon buffer gas on the CPT linewidth, amplitude, and frequency shift. The results may offer some references for CPT atomic clocks and CPT atomic magnetometers.We present a pair of phase-locked lasers with a 9.2-GHz frequency difference through the injection locking of a master laser to the RF-modulation sideband of a slave diode laser. Using this laser system, a coherent population trapping (CPT) signal with a typical linewidth of ∼ 182 Hz is obtained in a cesium vapor cell filled with 30 Torr (4 kPa) of neon as the buffer gas. We investigate the influence of the partial pressure of the neon buffer gas on the CPT linewidth, amplitude, and frequency shift. The results may offer some references for CPT atomic clocks and CPT atomic magnetometers.

Chinese Physics BApr 1, 20133 citations

Optimization of a Prototype Atomic Clock Based on Coherent Population Trapping

Eugeniy E. Mikhailov, Nathan Belcher, Irina V. Novikova

The goal of this project is to optimize parameters of a prototype atomic clock to achieve the best Allan variance. We have established a prototype atomic clock using coherent population trapping (CPT) by creating a laser system to lock the laser’s frequency to an atomic resonance in rubidium and utilized radiofrequency (rf) modulation to create a sideband and carrier comb. With the system assembled, we have achieved our best Allan variance of 4 × 10−10 for a 15 torr Neon buffer gas cell, but have changed to a 5 torr Neon buffer gas cell to decrease the Allan variance.The goal of this project is to optimize parameters of a prototype atomic clock to achieve the best Allan variance. We have established a prototype atomic clock using coherent population trapping (CPT) by creating a laser system to lock the laser’s frequency to an atomic resonance in rubidium and utilized radiofrequency (rf) modulation to create a sideband and carrier comb. With the system assembled, we have achieved our best Allan variance of 4 × 10−10 for a 15 torr Neon buffer gas cell, but have changed to a 5 torr Neon buffer gas cell to decrease the Allan variance.

Bulletin of the American Physical SocietyOct 30, 20081 citation

Optimization of Buffer Gas Compositions in Atomic Vapor Cell for Coherent Population Trapping Atomic Clock

Related papers

Optimization of Buffer Gas Compositions in Atomic Vapor Cell for Coherent Population Trapping Atomic Clock

Related papers