Accession Number:

ADA100905

Title:

Mode Medium Interaction. A Theoretical Study.

Descriptive Note:

Final technical rept. 1 Jul 79-30 Jun 80,

Corporate Author:

AVCO EVERETT RESEARCH LAB INC EVERETT MA

Personal Author(s):

Report Date:

1980-09-01

Pagination or Media Count:

176.0

Abstract:

An instability in the output of a high-power unstable-resonator cw CO2 laser is analyzed in terms of the perturbative effect of an acoustic wave which is induced by laser heating. The alignment sensitivity of such a laser is also explained in terms of a temperature gradient along the gas-flow direction, which is transverse to the laser axis. We extend our instability analysis to a simple one-dimensional model of a supersonic laser, which we determine to be stable. Finally, we present a new computational technique to determine the intensity distribution and output coupling of the modes of an unstable resonator whose gain is saturated by a variable amount by the flux of the lowest-loss mode. The intensity distribution of this lowest-loss mode is determined self consistently. Author

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE