Browse Prior Art Database

Tools to Measure Fiber-optic Duplex Connector/ Module Pluggability

IP.com Disclosure Number: IPCOM000107660D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 3 page(s) / 93K

Publishing Venue

IBM

Related People

Barringer, WA: AUTHOR [+6]

Abstract

Mechanical pluggability of a module/connector pair is determined by the ability of the connector ferrules to accommodate the inherent misalignment of the module Optical Subassemblies (OSAs) (refer to Fig. 1). To achieve this required accommodation, the connector is designed to allow the ferrules to "float" within the connector body. Another accommodation mechanism exists in that there are mechanical clearances between the connector and the module/shroud. Hence, the connector can move in the shroud to adjust to the OSA misalignment. Therefore, for acceptable pluggability, it must be assured that the total accommodation that the ferrules can give (due to "float" and shroud/connector clearance) must exceed the OSA misalignment.

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This is the abbreviated version, containing approximately 61% of the total text.

Tools to Measure Fiber-optic Duplex Connector/ Module Pluggability

       Mechanical pluggability of a module/connector pair is
determined by the ability of the connector ferrules to accommodate
the inherent misalignment of the module Optical Subassemblies (OSAs)
(refer to Fig. 1).  To achieve this required accommodation, the
connector is designed to allow the ferrules to "float" within the
connector body.  Another accommodation mechanism exists in that there
are mechanical clearances between the connector and the
module/shroud. Hence, the connector can move in the shroud to adjust
to the OSA misalignment.  Therefore, for acceptable pluggability, it
must be assured that the total accommodation that the ferrules can
give (due to "float" and shroud/connector clearance) must exceed the
OSA misalignment.  Theoretically, measurements of float,
shroud/connector clearance and OSA misalignment could be performed,
but would be time-consuming and expensive.

      The tools disclosed herein assure both the connector and the
module pluggability.  The tool in Fig. 2a is a "worst-case
connector".  It is precision machined to allow the ferrule to float
in both angle and translation only to the connector specification
minimum.  The external body dimensions are at the connector
specification maximum to minimize the amount of movement with respect
to the shroud. Controlling these two parameters in this manner makes
this connector the most difficult to plug into a module, whe...