Germania-based core optical fibers

Germania-glass-based core silica glass cladding single-mode fibers (/spl Delta/n up to 0.143) with a minimum loss of 20 dB/km at 1.9 /spl mu/m were fabricated by the modified chemical vapor deposition (MCVD) method. The fibers exhibit strong photorefractivity with the type-IIa-induced refractive-ind...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 23; no. 11; pp. 3500 - 3508
Main Authors Dianov, E.M., Mashinsky, V.M.
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2005
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Chemical vapor deposition
Core loss
Fiber lasers
Fibers
Germanium oxides
Glass
Modulation
Noise levels
Optical fiber losses
Optical fibers
Optical refraction
optical-fiber materials
Photorefractive effect
Photorefractivity
Pump lasers
Pumps
Raman lasers
Silicon compounds
Stimulated emission
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Summary:Germania-glass-based core silica glass cladding single-mode fibers (/spl Delta/n up to 0.143) with a minimum loss of 20 dB/km at 1.9 /spl mu/m were fabricated by the modified chemical vapor deposition (MCVD) method. The fibers exhibit strong photorefractivity with the type-IIa-induced refractive-index modulation of 2/spl times/10/sup -3/. The Raman gain of 300 to 59 dB/(km/spl middot/W) was determined at 1.07 to 1.6 /spl mu/m, respectively, in a 75 mol.% GeO/sub 2/ core fiber. Only 3 m of such fibers are enough for the creation of a 10-W Raman laser at 1.12 /spl mu/m with a 13-W pump at 1.07 /spl mu/m. Raman generation in optical fiber at a wavelength of 2.2 /spl mu/m was obtained for the first time.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2005.855867