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  4. CPT Cesium-Cell Atomic Clock Operation With a 12-mW Frequency Synthesizer ASIC
 
research article

CPT Cesium-Cell Atomic Clock Operation With a 12-mW Frequency Synthesizer ASIC

Zhao, Yazhou  
•
Tanner, Steve  
•
Casagrande, Arnaud
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2015
Ieee Transactions On Instrumentation And Measurement

In this paper, we present the design, fabrication, and electrical characterization of a low-power microwave source for interrogation of cesium atomic hyperfine transition frequency using the coherent population trapping (CPT) technique. The 4.6-GHz frequency generation and signal buffering is performed by a single-chip frequency synthesizer ASIC with a frequency tuning resolution of 1 x 10(-13) and a programmable RF output power from -10 to 0 dBm. The circuit was used to modulate the current of a vertical-cavity surface-emitting laser through a dedicated impedance matching network and low thermal conductivity transmission line. Strong modulation sidebands with >60% of carrier amplitude were obtained with an ASIC power consumption of 12 mW. The system was used as optical source for atomic interrogation in an experimental cesium CPT clock. The measured clock stability of 5 x 10(-11) at tau = 1 s, going down to 4.5 x 10(-12) at tau = 200 s, is limited by the signal-to-noise ratio of the detected CPT signal.

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Type
research article
DOI
10.1109/Tim.2014.2329383
Web of Science ID

WOS:000346085800026

Author(s)
Zhao, Yazhou  
Tanner, Steve  
Casagrande, Arnaud
Affolderbach, Christoph
Schneller, Luc
Mileti, Gaetano
Farine, Pierre-Andre  
Date Issued

2015

Publisher

Institute of Electrical and Electronics Engineers

Published in
Ieee Transactions On Instrumentation And Measurement
Volume

64

Issue

1

Start page

263

End page

270

Subjects

Atomic clocks

•

cesium

•

frequency synthesizers

•

microwave circuits

•

phase locked loops (PLLs)

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

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February 20, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/111370
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