Optical fiber for extended wavelength band
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United States of America Patent
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Apr 19, 2005
Issued Date -
N/A
app pub date -
Apr 16, 2004
filing date -
Sep 21, 1998
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Expired
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Abstract
An optical transmission fiber for use in a wavelength division multiplexing transmission system is disclosed. The transmission fiber includes an inner core surrounded by a first, second and at least a third glass layer along the length of the fiber. The first glass layer has a depressed refractive-index difference and the second glass layer has a refractive-index difference of substantially zero. The third glass layer has a positive refractive-index difference. The fiber has an improved relationship between dispersion slope and depressed profile volume. The fiber can have a dispersion value of at least 1.5 ps/nm/km and a dispersion slope of less than about 0.07 ps/nm.sup.2 /km over an extended range of carrier wavelengths for the transmission system, such as the range 1450-1650 nm.
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