C-w (continuous-wave) stimulated brillouin scattering of long-pulse chemical laser beams. Technical report

Technical Report · Wed Nov 15 00:00:00 EST 1989

OSTI ID:7070011

Amimoto, S T; Hofland, R

Backward Stimulated Brillouin Scattering (SBS) is currently under consideration as a nonlinear optical process for passive phase conjugation (beam clean up) phase matching (beam combination), and pointing and tracking of continuous-wave (CW) HF chemical lasers for high power applications. Theoretical considerations indicate, however, that forward SBS processes dominate over backward SBS phenomena in the steady-state limit, so that SBS exhibits the desired properties (phase conjugation) only for short time periods. Since backward SBS thresholds for CW HF lasers are about 0.20 MW per spectral line, long-pulse laboratory chemical laser sources (PCLs) are needed to investigate small-angle forward scattering phenomena and the development of techniques for their suppression. The laser data presented herein suggest that a moderate-volume, photolysis-pumped PCL is a suitable source for the study of steady-state forward SBS processes and their suppression. In particular, low pressure PCLs can simulate CW HF-laser SBS behavior under conditions of the proper bandwidth, laser spectrum, SBS media effects, longitudinal mode structure, and other high-power HF laser characteristics.

• Research Organization: Aerospace Corp., El Segundo, CA (USA). Laboratory Operations
• OSTI ID: 7070011
• Report Number(s): AD-A-216409/3/XAB; TR-0086A(2930-06)1
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
CHEMICAL LASERS
LASER RADIATION
LIGHT SCATTERING
BACKSCATTERING
BRILLOUIN EFFECT
LOW PRESSURE
NONLINEAR OPTICS
NONLINEAR PROBLEMS
OPTICAL PROPERTIES
PHONONS
POWER
PROGRESS REPORT
SCATTERING
SPECTRA
STEADY-STATE CONDITIONS
COHERENT SCATTERING
DOCUMENT TYPES
ELECTROMAGNETIC RADIATION
LASERS
OPTICS
PHYSICAL PROPERTIES
QUASI PARTICLES
RADIATIONS
426002* - Engineering- Lasers & Masers- (1990-)