Development and metrological characterization of a high-performance Cs cell atomic clock based on coherent population trapping

Abstract : This thesis work, performed in the frame of the MClocks European project (http://www.inrim.it/mclocks), reports the development and metrological characterization of a high-performance Cs vapor cell atomic clock based on coherent population trapping (CPT). The clock uses an optimized CPT pumping scheme, named push-pull optical pumping (PPOP), allowing the detection of high-contrast CPT resonances on the 0-0 magnetic-field insensitive clock transition. A detailed characterization of key components of the clock is reported. The clock was operated in the continuous-wave (CW) regime and in a Ramsey-like pulsed regime. In both regimes, the clock demonstrates a short-term fractional frequency stability at the level of 2 10−13 τ−1/2 up to 100 s averaging time, mainly limited by laser power effects. This CPT clock, ranking among the best microwave vapor cell atomic frequency standards, could find applications in telecommunication, instrumentation, defense or satellite-based navigation systems.This thesis reports also a novel laser frequency stabilization technique using dual-frequency sub-Doppler spectroscopy in a vapor cell. The clock ”platform” has also been used to perform using CPT spectroscopy the characterization of a Cs vapor cell coated with octadecyltrichlorosilane (OTS) or original buffer-gas filled Cs vapor micro-fabricated cells developed in FEMTO-ST for CPT-based miniature atomic clocks.
Complete list of metadatas

Cited literature [270 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01809998
Contributor : Abes Star <>
Submitted on : Thursday, June 7, 2018 - 1:29:07 PM
Last modification on : Friday, July 6, 2018 - 3:06:09 PM
Long-term archiving on : Saturday, September 8, 2018 - 1:34:20 PM

File

these_A_ABDELHAFIZ_Moustafa_20...
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01809998, version 1

Citation

Moustafa Abdel Hafiz. Development and metrological characterization of a high-performance Cs cell atomic clock based on coherent population trapping. Atomic Physics [physics.atom-ph]. Université Bourgogne Franche-Comté, 2017. English. ⟨NNT : 2017UBFCD035⟩. ⟨tel-01809998⟩

Share

Metrics

Record views

229

Files downloads

92