Interferometric determination of gamma radiation effects on optical parameters of a GRIN optical fibre

M. Medhat, S. Y. El-Zaiat, Saleh M. Abdou, Amr Radi, M. F. Omar

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Multiple-beam white-light interference fringes across an irradiated GRIN fibre, of length 2 cm and immersed in a liquid wedge interferometer that is followed by a grating spectrograph, are produced. These fringes are used to investigate the effect of gamma radiation, with different doses from 0.01 to 1 MGy, on the optical parameters of both the cladding (pure silica) and the core (germanium-doped silica) of the GRIN fibre. Optical parameters such as refractive index, refractive index difference, numerical aperture, V-number, index profile, chromatic dispersion and zero-dispersion wavelength are determined and studied. A two-term Sellmeier dispersion relation is adopted and fitted to the experimental data of the refractive index. Then, a dose-dependent Sellmeier formula is deduced to represent the effect of gamma radiation on different optical parameters.

Original languageEnglish
Pages (from-to)485-490
Number of pages6
JournalJournal of Optics A: Pure and Applied Optics
Volume4
Issue number4
DOIs
Publication statusPublished - Jul 2002

Fingerprint

gradient index optics
Radiation effects
radiation effects
Gamma rays
Optical fibers
Refractive index
optical fibers
gamma rays
refractivity
Silicon Dioxide
Silica
silicon dioxide
Germanium
Light interference
dosage
Chromatic dispersion
Spectrographs
fibers
Fibers
numerical aperture

Keywords

  • Dispersion
  • Gamma radiation
  • GRIN fibre
  • Interferometric
  • Optical parameters
  • Refractive index

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Interferometric determination of gamma radiation effects on optical parameters of a GRIN optical fibre. / Medhat, M.; El-Zaiat, S. Y.; Abdou, Saleh M.; Radi, Amr; Omar, M. F.

In: Journal of Optics A: Pure and Applied Optics, Vol. 4, No. 4, 07.2002, p. 485-490.

Research output: Contribution to journalArticle

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