Optical Fibres - Measurement Methods - Microbending Sensitivity
|Publication Date:||1 October 2001|
|ICS Code (Fibres and cables):||33.180.10|
Scope and object
This technical report describes four techniques for the measurement of microbending sensitivity of optical fibre.
Methods A and B may also be used to measure the microbending sensitivity of optical fibre ribbons.
Methods A, B, C and D are distinguished by the equipment used for measurements and their applications:
• method A uses an expandable drum and applies to class B fibres;
• method B uses a fixed diameter drum and applies to category A1 and class B fibres;
• method C uses a wire mesh and applied loads and applies to category A1 and class B fibres;
• method D uses a "basketweave" wrap on a fixed diameter drum, and applies to class B fibres.
Methods A and C offer the capability to measure the microbending sensitivity over a wide range of applied linear pressure or loads. Method B may be used to determine the microbending sensitivity for a fixed linear pressure.
The results from the four methods can only be compared qualitatively.
These methods do not constitute a routine test used in the general evaluation of optical fibre. This parameter is not generally specified within a detail specification.