Fujikura FSM-20PMII, Инструкция по эксплуатации

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7.3 ECF (Eccentricity Correction Function)
7.3 ECF (Eccentricity Correction Function) 7.3 ECF (Eccentricity Correction Function)
7.3 ECF (Eccentricity Correction Function)
When optical fibers are spliced, surface tension of the molten glass tends to draw
the cladding into alignment. If core eccentricity is present, the splicer core
alignment process (before the splice) will align the fiber cores. Because of the
eccentricity, the cladding will therefore be miss aligned. The surface tension of
the molten glass during the fusion arc will tend to draw the cladding into self-
alignment, causing the loss of core alignment, and high splice loss, as in (A)
below.
To compensate for this tendency, this splicer is provided with the Eccentricity
Correction Function (ECF). With the use of the ECF function, the splicer
calculates the amount of cladding self-alignment motion which will occur due to
surface tension. The splicer therefore corrects for the surface tension by applying
an intentional core offset during the alignment process. The intentional core
offset will be eliminated by the surface tension motion effect, resulting in perfect
core alignment at the end of the fusion arc, as shown in (B) below.
(A) Splice without ECF
Aligned
Spliced Spliced
ECF
Aligned
(B) Splice with ECF