Improved surface coverage of an optical fibre with nanocrystalline diamond by the application of dip-coating seeding - Publication - MOST Wiedzy

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Improved surface coverage of an optical fibre with nanocrystalline diamond by the application of dip-coating seeding

Abstract

Growth processes of diamond thin films on the fused silica optical fibres (10 cm in length) were investigated at various temperatures. Fused silica pre-treatment by dip-coating in a dispersion consisting of detonation nanodiamond (DND) in dimethyl sulfoxide (DMSO) with polyvinyl alcohol (PVA) was applied. Nanocrystalline diamond (NCD) films were deposited on the fibres using the microwave plasma assisted chemical vapour deposition (MW PA CVD) method. The longitudinal variation of NCD morphology, structure and optical parameters were specifically investigated. The evolution of the film morphology and film thickness along the fibre length was studied using scanning electron microscopy (SEM). The chemical composition of the NCD film was examined with micro-Raman Spectroscopy. The sp3/sp2 band ratio was calculated using the Raman spectra deconvolution method. An approximately 5 cm-long homogeneous diamond film has been obtained on the surface of the fibre sample. Thickness, roughness and optical properties of NCD films in the VIS–NIR range were investigated on the reference quartz slides using spectroscopic ellipsometry. The samples exhibited relatively low deviations of refractive index (2.3 ± 0.25) and extinction coefficient (0.05 ± 0.02) along the length of 5 cm, as estimated at a wavelength of 550 nm. In order to show the effectiveness of deposition process on optical fibres, diamond films were also grown on the fibre with induced long-period grating (LPG). The results of transmission measurements demonstrated that an LPG with diamond overlay exhibits the appropriate dependency on the optical properties of external medium. Thus, the deposition process has a negligible effect on the fibre transmission properties.

Citations

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
DIAMOND AND RELATED MATERIALS no. 55, pages 52 - 63,
ISSN: 0925-9635
Language:
English
Publication year:
2015
Bibliographic description:
Bogdanowicz R., Sobaszek M., Ryl J., Gnyba M., Ficek M., Gołuński Ł., Bock W., Śmietana M., Darowicki K.: Improved surface coverage of an optical fibre with nanocrystalline diamond by the application of dip-coating seeding// DIAMOND AND RELATED MATERIALS. -Vol. 55, (2015), s.52-63
DOI:
Digital Object Identifier (open in new tab) 10.1016/j.diamond.2015.03.007
Verified by:
Gdańsk University of Technology

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