On the origin of excess loss in highly GeO/sub 2/-doped single-mode MCVD fibers

Index profile grading and elimination of the central dip have yielded the lowest loss ever reported for modified chemical vapor deposition-made highly GeO/sub 2/-doped single-mode fibers (1.33 dB/km at 1550 nm for /spl Delta/=2.9%). Investigation of the angular distribution of scattering has shown t...

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Bibliographic Details
Published in:IEEE photonics technology letters 2004-08, Vol.16 (8), p.1870-1872
Main Authors: Bubnov, M.M., Semjonov, S.L., Likhachev, M.E., Dianov, E.M., Khopin, V.F., Salganskii, M.Yu, Guryanov, A.N., Fajardo, J.C., Kuksenkov, D.V., Joohyun Koh, Mazumder, P.
Format: Article
Language:English
Subjects:
Fiber nonlinear optics
Nonlinear optical devices
Optical fiber devices
Optical fiber losses
Optical fibers
Optical refraction
Optical scattering
Optical variables control
Rayleigh scattering
Stimulated emission
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Summary:Index profile grading and elimination of the central dip have yielded the lowest loss ever reported for modified chemical vapor deposition-made highly GeO/sub 2/-doped single-mode fibers (1.33 dB/km at 1550 nm for /spl Delta/=2.9%). Investigation of the angular distribution of scattering has shown that much of the optical loss in such fibers is due to anomalous scattering. This scattering arises in the region of the central dip in the refractive index profile and at the core-cladding interface.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2004.829756