Velocity distribution and second-order Doppler shift in an optically pumped cesium beam frequency standard

Author

Lee, Ho Seong ; Baek, Kwang Jae ; Kwon, Taeg Yong ; Yang, Sung Hoon

Author_Institution

Div. of Electromagn. Metrol., Korea Res. Inst. of Stand. & Sci., Taejon, South Korea

Volume

48

Issue

2

fYear

1999

fDate

4/1/1999 12:00:00 AM

Firstpage

492

Lastpage

495

Abstract

The velocity distribution and the second-order Doppler shift were obtained in an optically pumped cesium beam frequency standard at the Korea Research Institute of Standards and Science (KRISS) by using Fourier transforms of Ramsey lineshapes. The second-order Doppler shift changes as much as 3×10^-15 for a variation 20 K at an oven temperature of 383 K. It also changes at a rate of -2.3×10 ^-14/dB around an optimum microwave power. We found that the velocity selective effect of a tilted laser beam can reduce the second-order Doppler shift. In particular, this effect becomes larger as the linewidth of the laser beam becomes narrower

Keywords

Doppler shift; Fourier transform optics; atomic beams; atomic clocks; frequency stability; frequency standards; optical pumping; 383 K; Cs; Fourier transforms; Ramsey lineshapes; cesium beam frequency standard; frequency stability; optically pumped; optimum microwave power; oven temperature; second-order Doppler shift; tilted laser beam; velocity distribution; velocity selective effect; Doppler shift; Fourier transforms; Frequency; Laser beams; Laser excitation; Masers; Optical beams; Optical pumping; Ovens; Temperature;

fLanguage

English

Journal_Title

Instrumentation and Measurement, IEEE Transactions on

Publisher

ieee

ISSN

0018-9456

Type

jour

DOI

10.1109/19.769638

Filename

769638