Wall depletion effect of population at upper laser level on optical gain in CO/sub 2/--He waveguide lasers

Journal Article · Tue Jun 01 04:00:00 EDT 1976 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.322957· OSTI ID:7366241

Shirahata, H; Fujioka, T

The wall depletion effect of CO/sub 2/ molecules at the excited (00 degree 1) level has been taken into consideration for the calculation of the optical gain of CO/sub 2/--He waveguide lasers having a circular discharge tube and a parallel-plate discharge tube. The simplified equations for obtaining the wall depletion rate for these two discharge tubes are presented and they are found to be in good agreement with the exact values. The numerical calculation revealed the presence of an optimum radius and height of discharge tubes as a function of gas pressure, mixing ratio of the laser gases, tubing materials, and the shape of the discharge tubes. The numerically computed small-signal gain has been found in good agreement with the experimentally observed values. (AIP)

• Research Organization: Department of Electrical Engineering, Faculty of Engineering, Keio University, 832 Hiyoshi-cho, Kohoku-ku, Yokohama, Japan
• OSTI ID: 7366241
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 47:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420300* -- Engineering-- Lasers-- (-1989)
CARBON DIOXIDE LASERS
COLLISIONS
CRYOGENIC FLUIDS
ELECTRIC DISCHARGES
ELECTRON COLLISIONS
ELECTRON-MOLECULE COLLISIONS
ELEMENTS
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXCITED STATES
FLUIDS
GAIN
GAS LASERS
HELIUM
LASERS
MOLECULE COLLISIONS
NONMETALS
OPERATION
POPULATION INVERSION
RARE GASES
WAVEGUIDES