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Proceedings Paper

Single-mode fibers with an additional ring lightguide for two-channel data transmission
Author(s): Mikhail I. Belovolov; A. S. Belanov; Mikhail M. Bubnov; Eugeni M. Dianov; Sergey L. Semjonov; S. G. Sinev; I. A. Krashchenko; V. I. Krivenkov; A. M. Belovolov; Alexei N. Guryanov; Vladimir F. Khopin
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Paper Abstract

For the first time, two-channel concentric-core optical fibers consisting of a broadband central single-mode lightguide for the wavelength of 1.3 micrometers and a ring multimode lightguide, 10 micrometers in thickness, have been developed. The outer fiber diameter is 125 micrometers . The fibers are meant for two-channel communication systems. Optical losses of less than 1 dB/km for the both cores have been achieved, the channel-to-channel crosstalk being less than -40 dB. A dependence of optical losses in the ring lightguide on the radius of curvature and strain of a coiled fiber has been revealed. The optimal refractive index profile of the ring core has been found to minimize optical losses in coiled and straightened fibers. A fiber-optic communication link, 12 km in length, has been constructed, and the loss distribution along the link has been investigated using the OTDR-technique. It is shown that there is no distributed coupling between the two cores and the channels remain independent even at large distances.

Paper Details

Date Published: 17 May 2000
PDF: 10 pages
Proc. SPIE 4083, Advances in Fiber Optics, (17 May 2000); doi: 10.1117/12.385647
Show Author Affiliations
Mikhail I. Belovolov, General Physics Institute (Russia)
A. S. Belanov, Moscow State Academy of Device Engineering and Information (Russia)
Mikhail M. Bubnov, General Physics Institute (Russia)
Eugeni M. Dianov, General Physics Institute (Russia)
Sergey L. Semjonov, General Physics Institute (Russia)
S. G. Sinev, General Physics Institute (Russia)
I. A. Krashchenko, General Physics Institute (Russia)
V. I. Krivenkov, Moscow State Academy of Device Engineering and Information (Russia)
A. M. Belovolov, General Physics Institute (Russia)
Alexei N. Guryanov, Institute of Chemistry of High-Purity Substances (Russia)
Vladimir F. Khopin, Institute of Chemistry of High-Purity Substances (Russia)

Published in SPIE Proceedings Vol. 4083:
Advances in Fiber Optics
Eugeni M. Dianov, Editor(s)

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