Abstract

A frequency-stabilization system of a helium–neon laser with an internal-mirror plasma tube is described. The temperature of the plasma tube immersed in water flow is regulated by controlling the temperature of the water by a temperature regulator. The frequency shift is detected with a Fabry-Perot etalon and phototube. The output variation of the phototube is fed as an error signal to the regulator. The error estimation is also discussed. The relative uncertainty of the frequency stabilization is less than ±3 × 10−9 over a period of longer than 24 h.

© 1983 Optical Society of America

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References

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  1. R. Balhorn, H. Kunzmann, F. Lebowsky, Appl. Opt. 11, 742 (1972).
    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
  4. T. Yoshino, Jpn. J. Appl. Phys. 19, 2181 (1980).
    [CrossRef]
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    [CrossRef] [PubMed]
  6. The output characteristics of the Yamabishi Denki model YHR 500 are waveform distortion <0.5%, line regulation <±0.1%, load regulation <0.1%, and response time <200 μsec.

1982

1980

T. Yoshino, Jpn. J. Appl. Phys. 19, 2181 (1980).
[CrossRef]

1975

1973

1972

Appl. Opt.

Jpn. J. Appl. Phys.

T. Yoshino, Jpn. J. Appl. Phys. 19, 2181 (1980).
[CrossRef]

Other

The output characteristics of the Yamabishi Denki model YHR 500 are waveform distortion <0.5%, line regulation <±0.1%, load regulation <0.1%, and response time <200 μsec.

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Figures (4)

Fig. 1
Fig. 1

Schematic diagram of the water flow and automatic temperature control systems: (1) water bath; (2) laser tube water jacket; (3) water reservoir; (4) cap which covers the end of the laser tube; (5) water pump; (6) valve; (7)–(9) water pipes; (10) thermistor; (11) electric heater.

Fig. 2
Fig. 2

Schematic diagram of the thermostatic box: (1) electric heater; (2) water pipe; (3) fan; (4) thermistor; (5) thermostatic water bath.

Fig. 3
Fig. 3

Thermal relaxation of the optical system due to 0.5°C stepwise rise in the box temperature.

Fig. 4
Fig. 4

Variation of output voltage of the phototube caused by frequency shift of the frequency-stabilized laser.

Equations (5)

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C d T = h ( T F ) d t ,
d Δ T d t + f Δ T = f w ( t ) ,
w ( t ) = F T 0 ,
w ( t ) = n ( A n sin ω n t + B n cos ω n t ) ,
Δ T = n ( A n f 2 + B n f ω n f 2 + ω n 2 sin ω n t A n ω n f B n f 2 f 2 + ω n 2 cos ω n t ) .

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