Photorefractive effect and photoinduced quadratic nonlinear susceptibility in germanosilicate fibres fabricated in nitrogen and helium atmospheres by the MCVD technique

Journal Article · Sat Sep 30 00:00:00 EDT 2000 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2000V030N09ABEH001808· OSTI ID:21442757

Vasil'ev, Sergei A; Vechkanov, N N; Dianov, Evgenii M; Mashinsky, V M; Medvedkov, O I; Sazhin, O D ^[1]; Gur'yanov, A N; Khopin, V F ^[2]; Yatsenko, Yu P ^[3]

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1. Fiber Optics Research Center, Russian Academy of Sciences, Moscow (Russian Federation)
2. Institute of Chemistry of High-Purity Substances, Russian Academy of Sciences, Nizhnii Novgorod (Russian Federation)
3. D.V. Skobel'tsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow (Russian Federation)

Single-mode optical fibres were fabricated from a germanosilicate glass by the method of modified chemical vapour deposition (MCVD), which used sintering of a porous glass in a reducing (helium or nitrogen-containing) atmosphere. The optical fibres exhibit a high photoinduced change in the refractive index and a high efficiency of recording quadratic nonlinear susceptibility compared to a standard germanosilicate fibre. Sintering, both in nitrogen and in helium atmospheres, was shown to increase the concentration of germanium oxygen-deficient centres in glass. It is likely that nitrogen enters into a germanosilicate glass in the concentration that is sufficient to modify the glass structure and to additionally increase its photosensitivity. The replacement of oxygen or silicon in the close vicinity of an oxygen vacancy by nitrogen may play a key role in the photosensitivity enhancement owing to the formation of additional valence bonds and blocking of recombination processes. (nonlinear optical phenomena)

• OSTI ID: 21442757
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 30, Issue 9; Other Information: DOI: 10.1070/QE2000v030n09ABEH001808; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL VAPOR DEPOSITION
GERMANIUM
GERMANIUM SILICATES
GLASS
HELIUM
NITROGEN
NONLINEAR PROBLEMS
OPTICAL FIBERS
OPTICAL MODES
OXYGEN
PHOTOSENSITIVITY
RECOMBINATION
REFRACTIVE INDEX
SINTERING
VACANCIES
VALENCE
CHEMICAL COATING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DEPOSITION
ELEMENTS
FABRICATION
FIBERS
FLUIDS
GASES
GERMANIUM COMPOUNDS
METALS
NONMETALS
OPTICAL PROPERTIES
OSCILLATION MODES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
RARE GASES
SENSITIVITY
SILICATES
SILICON COMPOUNDS
SURFACE COATING