Table of Contents
Advertisement
Fusion
During fusion, the fibers are joined together and subjected to five different currents
as illustrated below. An important parameter, which changes during splicing, is
the distance between the fibers. During Pre-fusion, the fibers are apart. With the
current phase changing, fibers are spliced gradually.
Splicing Process
The most important splicing parameters are the time and current, each current
phase is shown below, that the name and function and other parameters are
important to the splice process are described under "Parameters for Normal
Splicing Process" on the next page.
The following figure shows the discharge conditions (The relationship between the
"discharge intensity" and "motor move"). We can change the splicing parameters
listed below to change the discharge conditions.
Diagram of ARC discharge condition
A: Pre-fuse power
B: Arc power
D: Pre-fuse time
E: Arc time
G: Taper wait time
H: Taper time related to taper length
22
C: Cleaning Arc
F: Overlap
I: Taper speed
4.4 Parameters for Normal Splicing Process
Parameter
A list of splice modes stored in the splicer database is displayed.
Upon inputting the appropriate mode, the selected splice mode
Template
stored in database area is copied to a selected splice mode in user-
programmable area.
Name
Title for a splice mode expressed in up to seven characters.
Detailed explanation for a splice mode expressed in up to 15
Note
characters. It is displayed at "Select splice mode" menu.
Focus-L
Set the focus parameter for lens X.
Focus-R
Set the focus parameter for lens Y.
Arc adjust
Set to adjust arc power according to the fibers' conditions.
If "Proof test" is set to "ON", a pull-test is performed upon opening
Pull test
the windproof cover or by pressing the SET button after splicing.
Loss estimate should be regarded as a reference. Since the loss is
calculated upon the fiber image, there is certain difference with the
Loss
real value. The estimate method is based on a single mode fiber and
estimate
calculates at the wavelength of 1.31μm. The estimated value can be a
valuable reference, but cannot be used as the basis of acceptance.
This amount is added to the estimate splice loss originally calculated.
When splicing specially or dissimilar fibers, a high actual splice loss
Minimum
may occur even with optimized arc conditions. To make the actual
loss
splice loss concur with the estimated splice loss, set the actual splice
loss to minimum value (minimum loss).
An error message is displayed if the estimated splice loss exceeds
Loss Limit
the selected threshold (loss limit).
Core angle
An error message is displayed if the bend angle of the two fibers
limit
spliced exceeds the selected threshold (Core angle limit).
Cleave angle
An error message is displayed if the cleave angle of either the left or
limit
right fiber ends exceed the selected threshold (cleave limit).
Set the relative position of the splicing location to the center of
electrodes. Splice loss may be improved in the case of dissimilar
Gap position
fiber splicing by shifting [Gap position] towards a fiber whose MFD is
bigger than the other fiber MFD.
Set the end-face gap between the left and right fibers at the time of
Gap
aligning and pre-fusion discharge.
Description
23
Advertisement
Table of Contents
