Action of the 216-nm fifth harmonic of a Nd:YAP laser on photosensitive germanosilicate glass films
- Institute of Applied Physics, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)
- Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)
The absorption spectrum, refractive index, and relief of the surface of a germanosilicate glass film are studied upon the non-destructive action of the 216-nm (5.75-eV) fifth harmonic of a repetitively pulsed Nd:YAP laser. It is shown that laser irradiation of films induces a strong photorefractive effect despite the relatively low absorption coefficient. For the 100-mJ cm{sup -2} energy density and above, two-photon process make a noticeable contribution to the absorption of laser radiation at 216 nm. The diffraction efficiency of photoinduced phase gratings achieved {approx}7x10{sup -3} for the exposure dose {approx}6 kJ cm{sup -2}, which corresponds to the induced refractive index 1.5x10{sup -3}. At higher exposure doses, a relief appears on a film surface and the diffraction efficiency of a phase grating is reduced. (interaction of laser radiation with matter. laser plasma)
- OSTI ID:
- 21470410
- Journal Information:
- Quantum Electronics (Woodbury, N.Y.), Vol. 33, Issue 11; Other Information: DOI: 10.1070/QE2003v033n11ABEH002530; ISSN 1063-7818
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ABSORPTION SPECTRA
DIFFRACTION
DOSES
EFFICIENCY
ENERGY DENSITY
GERMANIUM SILICATES
GLASS
GRATINGS
HARMONIC GENERATION
LASER RADIATION
MULTI-PHOTON PROCESSES
NEODYMIUM LASERS
REFRACTIVE INDEX
THIN FILMS
COHERENT SCATTERING
ELECTROMAGNETIC RADIATION
FILMS
FREQUENCY MIXING
GERMANIUM COMPOUNDS
LASERS
OPTICAL PROPERTIES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
SILICATES
SILICON COMPOUNDS
SOLID STATE LASERS
SPECTRA