Dispersion-compensating module

This invention relates generally to improvements to optical fiber, and more particularly to the design of a dispersion-compensating (DC) module. Disclosed is a dispersion-compensating (DC) module [comprising a first length of DC optical fiber [in tandem with a second length of a standard singlemode...

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Bibliographic Details
Main Authors Gruner-Nielsen, Lars, Kristensen, Poul, Trong Le, Quang Nghi, Wandel, Marie
Format Patent
LanguageEnglish
Published 25.11.2003
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Summary:This invention relates generally to improvements to optical fiber, and more particularly to the design of a dispersion-compensating (DC) module. Disclosed is a dispersion-compensating (DC) module [comprising a first length of DC optical fiber [in tandem with a second length of a standard singlemode optical fiber. The DC fiber is fabricated from silica glass and has a refractive index profile that includes a core region [surrounded by a cladding region [having a nominal refractive index n. The core region includes a central core [having a nominal refractive index n, a "trench" [surrounding the central core having a nominal refractive index n, and a "ridge" [surrounding the trench having a nominal refractive index n. A range of refractive index profiles has been found that provides relative dispersion slopes (RDS) that are greater than 0.012 nmand figures of merit that are greater than 200 ps/(nm·dB).