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Title: Photoinduced absorption and refractive-index induction in phosphosilicate fibres by radiation at 193 nm

Abstract

The photoinduced room-temperature-stable increase in the refractive index by {approx}5x10{sup -4} at a wavelength of 1.55 {mu}m was observed in phosphosilicate fibres without their preliminary loading with molecular hydrogen. It is shown that irradiation of preliminary hydrogen-loaded fibres by an ArF laser at 193 nm enhances the efficiency of refractive-index induction by an order of magnitude. The induced-absorption spectra of preforms with a phosphosilicate glass core and optical fibres fabricated from them are studied in a broad spectral range from 150 to 5000 nm. The intense induced-absorption band ({approx}800 cm{sup -1}) at 180 nm is found, which strongly affects the formation of the induced refractive index. The quantum-chemical model of a defect related to this band is proposed. (optical fibres)

Authors:
; ; ; ; ;  [1]; ;  [2]
  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)
Publication Date:
OSTI Identifier:
21466654
Resource Type:
Journal Article
Resource Relation:
Journal Name: Quantum Electronics (Woodbury, N.Y.); Journal Volume: 37; Journal Issue: 4; Other Information: DOI: 10.1070/QE2007v037n04ABEH013455
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ABSORPTION; ABSORPTION SPECTRA; ARGON FLUORIDES; DEFECTS; GLASS; HYDROGEN; LASERS; OPTICAL FIBERS; RADIATION EFFECTS; REFRACTIVE INDEX; TEMPERATURE RANGE 0273-0400 K; WAVELENGTHS; ARGON COMPOUNDS; ELEMENTS; FIBERS; FLUORIDES; FLUORINE COMPOUNDS; HALIDES; HALOGEN COMPOUNDS; NONMETALS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RARE GAS COMPOUNDS; SORPTION; SPECTRA; TEMPERATURE RANGE

Citation Formats

Rybaltovsky, A A, Sokolov, V O, Plotnichenko, V G, Lanin, Aleksei V, Semenov, S L, Dianov, Evgenii M, Gur'yanov, A N, and Khopin, V F. Photoinduced absorption and refractive-index induction in phosphosilicate fibres by radiation at 193 nm. United States: N. p., 2007. Web. doi:10.1070/QE2007V037N04ABEH013455.
Rybaltovsky, A A, Sokolov, V O, Plotnichenko, V G, Lanin, Aleksei V, Semenov, S L, Dianov, Evgenii M, Gur'yanov, A N, & Khopin, V F. Photoinduced absorption and refractive-index induction in phosphosilicate fibres by radiation at 193 nm. United States. doi:10.1070/QE2007V037N04ABEH013455.
Rybaltovsky, A A, Sokolov, V O, Plotnichenko, V G, Lanin, Aleksei V, Semenov, S L, Dianov, Evgenii M, Gur'yanov, A N, and Khopin, V F. Mon . "Photoinduced absorption and refractive-index induction in phosphosilicate fibres by radiation at 193 nm". United States. doi:10.1070/QE2007V037N04ABEH013455.
@article{osti_21466654,
title = {Photoinduced absorption and refractive-index induction in phosphosilicate fibres by radiation at 193 nm},
author = {Rybaltovsky, A A and Sokolov, V O and Plotnichenko, V G and Lanin, Aleksei V and Semenov, S L and Dianov, Evgenii M and Gur'yanov, A N and Khopin, V F},
abstractNote = {The photoinduced room-temperature-stable increase in the refractive index by {approx}5x10{sup -4} at a wavelength of 1.55 {mu}m was observed in phosphosilicate fibres without their preliminary loading with molecular hydrogen. It is shown that irradiation of preliminary hydrogen-loaded fibres by an ArF laser at 193 nm enhances the efficiency of refractive-index induction by an order of magnitude. The induced-absorption spectra of preforms with a phosphosilicate glass core and optical fibres fabricated from them are studied in a broad spectral range from 150 to 5000 nm. The intense induced-absorption band ({approx}800 cm{sup -1}) at 180 nm is found, which strongly affects the formation of the induced refractive index. The quantum-chemical model of a defect related to this band is proposed. (optical fibres)},
doi = {10.1070/QE2007V037N04ABEH013455},
journal = {Quantum Electronics (Woodbury, N.Y.)},
number = 4,
volume = 37,
place = {United States},
year = {Mon Apr 30 00:00:00 EDT 2007},
month = {Mon Apr 30 00:00:00 EDT 2007}
}
  • The photoinduced growth of the refractive index of phosphosilicate glass during Bragg grating inscription and the thermal decay of the grating have a number of unusual features. The observed index variations are interpreted in terms of a new model for photoinduced glass network rearrangement. The model assumes the formation of photoinduced voids (nanopores) in the glass network near point defects. The nanopores may migrate through the network via bond switching when the network is in a 'soft' state. The photoinduced variations in network density lead to index variations. (fibres)
  • Induced absorption is measured in a hydrogen-unloaded phosphosilicate glass (PSG) in spectral ranges from 140 to 850 nm and from 1000 to 1700 nm before and after its exposure to the 193-nm radiation. It is shown that the induced-absorption bands in the range between 140 and 300 nm do not coincide with the bands observed earlier after exposing a PSG to X-rays. It is assumed that the photorefractive effect in the PSG is related to variations induced in the glass network rather than to defects responsible for the induced-absorption bands. (fiber and integrated optics)
  • The IR absorption and Raman spectra of phosphosilicate glass (PSG) are measured during its exposure to radiation at a wavelength of 193 nm. The obtained data demonstrate the complicated rearrangement dynamics of the glass network around phosphor atoms and of the glass network as a whole. The experimental dependences are explained by the model of the PSG network based on the concepts of the theory of rigidity percolation. (interaction of laser radiation with matter)
  • A method for studying the dynamics of transformation of defects in optical fibres, exposed to UV radiation, by the dose dependence of the induced refractive index is proposed. The processes of transformation of defects in a low-loss phosphosilicate fibre, loaded with molecular hydrogen, irradiated at the 193-nm wavelength are investigated using this method. It is assumed that such a fibre has at least two types of defects, responsible for the induction of the refractive index. (optical fibres)
  • Polysilane materials exhibit large photo-induced refractive index changes under low incident optical fluences, making them attractive candidates for applications in which rapid patterning of photonic device structures is desired immediately prior to their use. This agile fabrication strategy for integrated photonics inherently requires that optical exposure, and associated material response, occurs in nonlaboratory environments, motivating the study of environmental conditions on the photoinduced response of the material. The present work examines the impact of atmosphere on the photosensitive response of poly(methylphenylsilane) (PMPS) thin films in terms of both photoinduced absorption change and refractive index modification. Material was subjected to UVmore » light exposure resonant with the lowest energy optical transition associated with the conjugated Si-Si backbone. Exposures were performed in both aerobic and anaerobic atmospheres (oxygen, air, nitrogen, and 5% H{sub 2}/95% N{sub 2}). The results clearly demonstrate that the photosensitive response of this model polysilane material was dramatically affected by local environment, exhibiting a photoinduced refractive index change, when exposed under an oxygen containing atmosphere, that was twice that observed under anaerobic conditions. This effect is discussed in terms of photo-oxidation processes within the polysilane structure and in the context of the need for predictable photosensitive refractive index change in varied photoimprinting environments.« less