Open AccessExperimental study on frequency stabilization method of internal-mirror He-Ne laser
Author(s) -
Jin Qian,
Zhongyou Liu,
Shi Chunying,
Xiuying Liu,
Jianbo Wang,
Cong Yin,
Shengbao Cai
Publication year - 2013
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.62.010601
Subject(s) - laser , materials science , optics , beat (acoustics) , laser power scaling , signal (programming language) , laser cooling , thermal , physics , thermodynamics , computer science , programming language
Frequency of an internal-mirror He-Ne laser is stabilized by using a micro cooling fan, instead of traditional heating method. Both the relationship between driving voltage and rotating speed and the thermal expansion of the intermal-mirror laser are discussed. The cavity length of the laser is controlled and adjusted by air cooling. The frequency stabilization is based on a theory of power balance between two longitudinal modes. The average temperature of the laser tube is less than 50 ℃ when the frequency is stabilized. A frequency fluctuation of less than 1.4 MHz in 20 h and a frequency relative standard uncertainty of U=4.710-9 in 4 months are evaluated by measuring the beat signal with a high-precision laser stabilized by iodine.