Browse Prior Art Database

Optical Fiber Connector using Encapsulated Index Matching Gel

IP.com Disclosure Number: IPCOM000115804D
Original Publication Date: 1995-Jun-01
Included in the Prior Art Database: 2005-Mar-30
Document File: 2 page(s) / 61K

Publishing Venue

IBM

Related People

Barrenger, W: AUTHOR [+2]

Abstract

Disclosed herein is an invention that describes a technique that makes it possible to connect two optical fibers, whereby a low loss of reflected light can be achieved without requiring that the gel be manually applied or handled in the process. This simplified technique makes it possible to automate the fiber manufacturing and measurement procedures that call for index matching gel.

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Optical Fiber Connector using Encapsulated Index Matching Gel

      Disclosed herein is an invention that describes a technique
that makes it possible to connect two optical fibers, whereby a low
loss of reflected light can be achieved without requiring that the
gel be manually applied or handled in the process.  This simplified
technique makes it possible to automate the fiber manufacturing and
measurement procedures that call for index matching gel.

      In prior art, a conventional solution is to manually apply
index matching gel to the optical fiber and interface connector, when
low light return loss is required.  There is no awareness of any
other solution for applying the gel to the fibers.

      Whenever two optical fibers are joined by a connector, a small
amount of light will be reflected from the interface instead of being
transmitted from one fiber to the other.  It is desirable to
eliminate this reflected light.  Existing optical connectors and
fiber with polished end faces can reduce unwanted back reflections
below -30 dBm.  This may not be low enough for some applications,
such as when a manufacturer needs to measure the return loss of the
optical fiber.  The current industry standard return loss measurement
methods call for the use of index matching gel on the fiber end
faces.  This gel coats both ends of the fiber and can reduce back
reflections significantly, in most cases more than -60 dBm.  However,
the gel must be applied manually to both sides of the fiber
interface; it is awkward to work with,...