Single mode optical fibers.

摘要

In a single mode optical fiber (10) of the type comprising a core (11), a cladding (12) surrounding the core (11) and an intermediate layer (13), the refractive indices n1, n2 and n3 respectively of the core (11), the cladding (12) and the intermediate layer (13) are selected such that the following relations are satisfied<MathDetails id="matha01"><MathText><![CDATA[ <img id="ia01" file="imga0001.tif" wi="79" he="13" img-content="math" img-format="tif" inline="no" /> ]]></MathText></MathDetails>

This optical fiber (10) has a transmission characteristic over a wider frequency band than the prior are and can provide a wave length multiplex transmission.