Accession Number:

ADA210613

Title:

Multiline Multimode CW Chemical Laser Performance

Descriptive Note:

Technical rept.

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA AEROPHYSICS LAB

Personal Author(s):

Report Date:

1989-07-01

Pagination or Media Count:

43.0

Abstract:

Effects of translational rotational nonequilibrium large scale cw chemical laser performance are evaluated for the case of a Fabry-Perot resonator with multiple longitudinal modes. Numerical results are presented for the limit Delta nu Sub c Delta nu sub h Delta nu sub d, where Delta nu sub c, Delta nu sub h, and Delta nu sub d denote longitudinal mode separation, homogeneous width, and Doppler width, respectively. Results include the effect of threshold gain on the power in each longitudinal mode, the power associated with each rotational energy level, and the net laser power. In the case of a saturated laser, an increase of threshold gain results in an increase in the output from strong rotational transitions at the expense of the output from weak rotational transitions. Total output is reduced. With further increase of threshold gain, the output from all rotational transitions is reduced. The case of rotational nonequilibrium and translational equilibrium is also considered. The latter case, a common assumption, is shown to provide net output power that is intermediate between the values for rotational and translational equilibrium and for rotational and translational nonequilibrium. Keywords Chemical laser Multiline laser Multimode laser Nonequilibrium Effects Theoretical performance Continuous wave Lasers.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE