Overview Of Atmospheric Effects On The Propagation Of High Energy Laser Radiation

1979 ◽  
Author(s):  
Frederick G. Gebhardt
Keyword(s):  
Laser Radiation ◽  
High Energy ◽  
Atmospheric Effects ◽  
Energy Laser ◽  
High Energy Laser

scholarly journals Climate Change: Anticipated Effects on High-Energy Laser Weapon Systems in Maritime Environments

2011 ◽  
Vol 50 (1) ◽  
pp. 153-166 ◽  
Author(s):  
Steven T. Fiorino ◽  
Robb M. Randall ◽  
Richard J. Bartell ◽  
Adam D. Downs ◽  
Peter C. Chu ◽  
...  
Keyword(s):  
Climate Change ◽  
Marine Boundary Layer ◽  
Climate Change Impacts ◽  
High Energy ◽  
Sea Surface ◽  
Atmospheric Effects ◽  
Near Surface ◽  
Energy Laser ◽  
High Energy Laser ◽  
Mean Differences

Abstract This study quantifies the potential impacts on ship-defense high-energy-laser (HEL) performance due to atmospheric effects in the marine boundary layer driven by recent observations and analysis of worldwide sea surface temperatures (SSTs). The atmospheric effects are defined using the worldwide probabilistic climatic database available in the High Energy Laser End-to-End Operational Simulation (HELEEOS) model, which includes an SST database for the period 1854–1997. A more recent worldwide sea surface temperature database was provided by the Naval Postgraduate School for the period 1990–2008. Mean differences and trends between the two SST databases are used to deduce possible climate change impacts on simulated maritime HEL engagements. The anticipated effects on HEL propagation performance are assessed at an operating wavelength of 1.0642 μm across the world’s oceans and mapped onto a 1° × 1° grid. The scenario evaluated is near surface and nearly horizontal over a range of 5000 m in which anticipated clear-air maritime aerosols occur. Summer and winter scenarios are considered. In addition to realistic vertical profiles of molecular and aerosol absorption and scattering, correlated optical turbulence profiles in probabilistic (percentile) format are used.

scholarly journals A high energy laser with controlled coherence

1986 ◽  
Vol 4 (3-4) ◽  
pp. 453-460 ◽  
Author(s):  
H. Schönnagel ◽  
H. Gunkel ◽  
J. Grzanna
Keyword(s):  
Laser Radiation ◽  
High Power ◽  
Spatial Coherence ◽  
High Energy ◽  
Optical Scheme ◽  
High Power Laser ◽  
Power Laser ◽  
Energy Laser ◽  
High Energy Laser

The coherence of the laser radiation limits the average beam fluence in high power laser installations. The disadvantages of present optical schemes are analysed. A new optical scheme with controlled spatial coherence is described and its consequences are shown.

scholarly journals Antibacterial efficiency of heat treatment on teeth root canals

2020 ◽  
Vol 24 (4) ◽  
pp. 202-205
Author(s):  
F. Y. Daurova ◽  
D. I. Tomaeva ◽  
S. V. Podkopaeva ◽  
Y. A. Taptun
Keyword(s):  
Heat Treatment ◽  
Laser Radiation ◽  
High Frequency ◽  
Antibacterial Effect ◽  
High Energy ◽  
Antibacterial Efficiency ◽  
Root Canals ◽  
Treatment Measures ◽  
Energy Laser ◽  
High Energy Laser

Aim. To determine the antibacterial efficiency of heat treatment on teeth root canals by the application of laser radiation and high-frequency diathermocoagulation in the complex curative measures. Materials and methods. We conducted 120 experiments on the removed teeth that were first placed for 24 hours in natrium chloride isotonic solution. Depending on the type of influence being studied, remote teeth were up-diffused in three groups. The antibacterial action of the high-energy laser radiation and high-frequency diathermocoagulation were studied. Results. During the experiment, the high antibacterial effect of monoarctic diathermocoagulation was reduced with the use of alternating current at a frequency of 2,64 Mhz in the treatment of the teeth root canals. Conclusion. The use of diathermocoagulation increases the effectiveness of the treatment measures, which helps to reduce the number of complications and the need for repeated interventions in the treatment of dental caries complications.

Sign in / Sign up

Export Citation Format

Share Document