Title :
Frequency stabilization of the sequence-band CO2 laser using the 4.3-μm fluorescence method
Author :
Tochitsky, Sergei Ya. ; Chou, Che-Chung ; Shy, Jow-Tsong
Author_Institution :
Inst. of Phys., Acad. of Sci., Minsk, Byelorussia
fDate :
7/1/1995 12:00:00 AM
Abstract :
The saturated 1.3-μm fluorescence stabilization method is applied to the 0002-[1001, 0201]I,II sequence band CO2 laser transitions. For this purpose, the 4.3-μm fluorescence is observed using an external longitudinal CO2 absorption cell heated to 300°C. The dependence of the frequency stability upon the gas temperature and pressure in the cell as well as laser parameters have been carried out in absolute frequency scale with the help of a two-channel heterodyne system. Under optimal conditions, the standard deviation of the beat note frequency between sequence band and regular band lasers for 30 s averaging time is less than 20 kHz, and the long-term stability and reproducibility is achieved at about 10 kHz
Keywords :
carbon compounds; demodulation; fluorescence; gas lasers; infrared spectra; infrared spectroscopy; laser frequency stability; laser transitions; laser variables measurement; optical modulation; optical saturation; 30 s; 300 C; 4.3 mum; CO2; absolute frequency scale; averaging time; beat note frequency; external longitudinal CO2 absorption cell; fluorescence method; frequency stability; frequency stabilization; gas pressure; gas temperature; laser parameters; long-term stability; optimal conditions; regular band lasers; reproducibility; saturated 1.3-μm fluorescence stabilization method; sequence band; sequence band CO2 laser transitions; sequence-band CO2 laser; two-channel heterodyne system; Fluorescence; Frequency; Gas lasers; Laser stability; Laser theory; Laser transitions; Physics; Pump lasers; Resonance; Spectroscopy;
Journal_Title :
Quantum Electronics, IEEE Journal of
