Plasma behind the front of a damage wave and the mechanism of laser-induced production of a chain of caverns in an optical fibre

Journal Article · Tue Aug 31 00:00:00 EDT 2004 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2004V034N08ABEH002845· OSTI ID:21470588

Yakovlenko, Sergei I ^[1]

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1. A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

The properties of the plasma behind the front of a damage wave generated by laser radiation in an optical fibre are considered. A plasma with a low degree of ionisation but a relatively high electron density is shown to emerge. However, the high absorption coefficient of laser radiation at a temperature of the order of 2000 K cannot be attributed to the presence of bremsstrahlung. The production of a chain of uniformly spaced caverns during the laser damage of the optical fibre is qualitatively explained. It is shown that this effect cannot be explained by the capillary Rayleigh instability because of the high viscosity of the glass. It is found that the fibre core deformation by a high pressure leads to an increase of the fibre volume sufficient to account for the emergence of the caverns after cooling. It is assumed that the periodicity of caverns is caused by the instability of a new type. A high-density double electrical-charge layer is produced at the plasma-liquid interface. Due to the repulsion of similar charges, the surface tends to increase, resulting in the instability development responsible for the production of the chain of caverns. (interaction of laser radiation with matter. laser plasma)

• OSTI ID: 21470588
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 34, Issue 8; Other Information: DOI: 10.1070/QE2004v034n08ABEH002845; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION
BREMSSTRAHLUNG
CAPILLARIES
COOLING
DEFORMATION
DENSITY
ELECTRON DENSITY
INSTABILITY
INTERFACES
IONIZATION
LASER RADIATION
LIQUIDS
OPTICAL FIBERS
PLASMA
PRESSURE RANGE MEGA PA 10-100
SURFACES
VISCOSITY
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
ELECTROMAGNETIC RADIATION
FIBERS
FLUIDS
ORGANS
PHYSICAL PROPERTIES
PRESSURE RANGE
PRESSURE RANGE MEGA PA
RADIATIONS
SORPTION