Frequency stability of an optically pumped cesium beam frequency standard

1989 ◽  
Vol 49 (4) ◽  
pp. 365-370 ◽  
Author(s):  
V. Candelier ◽  
V. Giordano ◽  
A. Hamel ◽  
G. Th�obald ◽  
P. C�rez ◽  
...  
Keyword(s):  
Frequency Standard ◽  
Frequency Stability ◽  
Optically Pumped

Frequency stability of an optically pumped caesium-beam frequency standard at the KRISS

Metrologia ◽  
1998 ◽  
Vol 35 (1) ◽  
pp. 25-31 ◽  
Author(s):  
H S Lee ◽  
S H Yang ◽  
J O Kim ◽  
Y B Kim ◽  
K J Baek ◽  
...  
Keyword(s):  
Frequency Standard ◽  
Frequency Stability ◽  
Optically Pumped

scholarly journals A pulsed-Laser Rb atomic frequency standard for GNSS applications

GPS Solutions ◽  
2021 ◽  
Vol 25 (3) ◽  
Author(s):  
S. Micalizio ◽  
F. Levi ◽  
C. E. Calosso ◽  
M. Gozzelino ◽  
A. Godone
Keyword(s):  
Optical Pumping ◽  
Frequency Standard ◽  
Frequency Stability ◽  
Allan Deviation ◽  
Rubidium Vapor ◽  
Vapor Cell ◽  
Continuous Regime ◽  
Remarkable Result ◽  
Averaging Time ◽  
Consequent Improvement

AbstractWe present the results of 10 years of research related to the development of a Rubidium vapor cell clock based on the principle of pulsed optical pumping (POP). Since in the pulsed approach, the clock operation phases take place at different times, this technique demonstrated to be very effective in curing several issues affecting traditional Rb clocks working in a continuous regime, like light shift, with a consequent improvement of the frequency stability performances. We describe two laboratory prototypes of POP clock, both developed at INRIM. The first one achieved the best results in terms of frequency stability: an Allan deviation of σy(τ) = 1.7 × 10−13 τ−1/2, being τ the averaging time, has been measured. In the prospect of a space application, we show preliminary results obtained with a second more recent prototype based on a loaded cavity-cell arrangement. This clock has a reduced size and exhibited an Allan deviation of σy(τ) = 6 × 10−13 τ−1/2, still a remarkable result for a vapor cell device. In parallel, an ongoing activity performed in collaboration with Leonardo S.p.A. and aimed at developing an engineered space prototype of the POP clock is finally mentioned. Possible issues related to space implementation are also briefly discussed. On the basis of the achieved results, the POP clock represents a promising technology for future GNSSs.

CANADIAN STANDARD OF FREQUENCY

1959 ◽  
Vol 37 (1) ◽  
pp. 10-18 ◽  
Author(s):  
S. N. Kalra ◽  
C. F. Pattenson ◽  
M. M. Thomson
Keyword(s):  
High Precision ◽  
Phase Measurement ◽  
Frequency Standard ◽  
Frequency Stability ◽  
Absolute Frequency ◽  
Standard Frequency ◽  
Astronomical Observations ◽  
The Past ◽  
Time Signals ◽  
Very High

Over the past 3 years a frequency standard of very high precision has been installed in Canada. It is composed of equipment located in three different laboratories in Ottawa, Ontario, but separated by a few miles. Intercomparison of frequency between these laboratories, which is done by sending signals over telephone lines and related techniques, is briefly described. Results indicate frequency stability of about 2:1010 over short and long periods. Absolute frequency is determined from astronomical observations. International inter-comparison is carried out by phase measurement of standard frequency and by observations of time signals; some of the results are presented.

An Optically Pumped Primary Frequency Standard

1989 ◽  
pp. 116-119 ◽  
Author(s):  
R. E. Drullinger ◽  
J. H. Shirley ◽  
D. J. Glaze ◽  
L. Hollberg
Keyword(s):  
Frequency Standard ◽  
Optically Pumped ◽  
Primary Frequency
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