Title :
The influence of Ne isotopes on the single mode operation of He-Ne and He-Ne/I2 lasers
Author :
Cartaleva, Stefka S. ; Dancheva, Yordanka V. ; Gerginov, Vladislav P.
Author_Institution :
Inst. of Electron., Bulgarian Acad. of Sci., Sofia, Bulgaria
fDate :
4/1/1997 12:00:00 AM
Abstract :
When using He-Ne lasers in our experiments, we observed that two adjacent longitudinal modes with the same polarization operate simultaneously with steady output power for each mode when the frequency spacing between them is several times lower than the homogeneous linewidth of the laser transition. In the case of a mixture of 20 Ne and 22Ne isotopes, an analytical expression for the output power is obtained and calculated for parameters close to the experimental conditions. The theoretical predictions are in agreement with the experimental results. The theory also shows that in the case of pure neon isotope the competition between the longitudinal modes is stronger than in the case of neon isotopes mixture. It is proposed to improve the single mode selection efficiency for He-Ne and He-Ne/I2 lasers and to enhance their single-mode output power using pure neon isotopes
Keywords :
gas lasers; helium; iodine; laser beam applications; laser frequency stability; laser modes; light interferometry; neon; 20Ne-22Ne isotopes; He-Ne; He-Ne lasers; He-Ne-I2; He-Ne/I2 lasers; Ne isotopes; frequency spacing; gas lasers; laser frequency stability; laser interferometry; laser transition; longitudinal mode; metrology; output power; polarization; pure neon isotopes; single-mode output power; steady output power; Frequency; Gas lasers; Isotopes; Laser modes; Laser stability; Laser transitions; Optical interferometry; Optical sensors; Power generation; Power lasers;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
