Accession Number : AD0784589

Title :   Analytical Investigation of the Effects of Rotational Relaxation in a C.W., HF Chemical Laser.

Descriptive Note : Interim technical rept.,

Corporate Author : PURDUE UNIV LAFAYETTE IND SCHOOL OF MECHANICAL ENGINEERING

Personal Author(s) : Chao,C. M. ; Skifstad,J. G.

Report Date : 14 JUN 1974

Pagination or Media Count : 36

Abstract : Rotational relaxation effects in a c. w. chemical laser amplifier or a line-selected oscillator are examined in terms of a simple analytical model. Three rotational levels in each vibrational level of the lasing transition are taken to have finite rotational relaxation rates. The results indicate the effects are likely to be significant, lowering the available power and leading to an optimum level of the line intensity for maximum power output, apart from consideration of optical losses at mirrors, windows, etc. While the model accounts for Delta j = plus or minus 1 transitions only, the collisional transition probability was augumented in the computations in an attempt to provide high estimates for the rotational relaxation rates, including factors such as Delta j > 1 transitions. (Author)

Descriptors :   *Chemical lasers, Molecular rotation, Fluorides, Molecular vibration, Electron transitions, Mathematical models, Gain

Subject Categories : Lasers and Masers
      Atomic and Molecular Physics and Spectroscopy

Distribution Statement : APPROVED FOR PUBLIC RELEASE