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

Abstract

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.

Authors:
;
Publication Date:
Research Org.:
Aerospace Corp., El Segundo, CA (USA). Laboratory Operations
OSTI Identifier:
7070011
Report Number(s):
AD-A-216409/3/XAB; TR-0086A(2930-06)1
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
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-)

Citation Formats

Amimoto, S T, and Hofland, R. C-w (continuous-wave) stimulated brillouin scattering of long-pulse chemical laser beams. Technical report. United States: N. p., 1989. Web.
Amimoto, S T, & Hofland, R. C-w (continuous-wave) stimulated brillouin scattering of long-pulse chemical laser beams. Technical report. United States.
Amimoto, S T, and Hofland, R. Wed . "C-w (continuous-wave) stimulated brillouin scattering of long-pulse chemical laser beams. Technical report". United States.
@article{osti_7070011,
title = {C-w (continuous-wave) stimulated brillouin scattering of long-pulse chemical laser beams. Technical report},
author = {Amimoto, S T and Hofland, R},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/7070011}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {11}
}

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