Polarization-maintaining optical fiber, method of manufacturing polarization-maintaining optical-fiber connecting portion, and polarization-maintaining optical-fiber connecting portion
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United States of America Patent
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Oct 5, 2010
Grant Date -
Nov 27, 2008
app pub date -
Jul 8, 2008
filing date -
Jul 12, 2006
priority date (Note) -
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Abstract
A polarization-maintaining optical fiber includes a core region and a cladding region formed around the core region. The cladding region has a refractive index lower than a refractive index of the core region. A refractive index profile of the core region is either one of a step shaped or a concave shaped. The cladding region includes two holes formed in such a manner that a shortest distance from the core region is virtually zero at locations in opposite to each other across the core region.
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