GPX3800 and GPX3850 Glass Processors
Chapter 8: Appendix
Rev B, July 24, 2018
Page 69
Chapter 8
Appendix
8.1. Top Inserts
The GPX3800 and GPX3850 Glass Processors require fiber holder inserts to be placed in the fiber holding blocks
in order to clamp the fibers during the splicing process. Fiber holder top inserts sit in the lid of the fiber holding
blocks and come in a variety of groove sizes. They can be used to clamp the cladding, coating, or buffer of a fiber.
The top inserts and bottom inserts can be paired in a variety of combinations to accommodate all fiber sizes
compatible with the glass processors, as shown in Figure 60. Multiple combinations of top and bottom inserts may
be required to accommodate all sizes of fiber to be spliced.
There are two types of top inserts. The standard top inserts (Item #'s starting with VHA) come in single-sided and
double-sided versions; the specified fiber diameter (in µm) is engraved on the part. These top inserts cannot be
used for end-view imaging. They are, however, compatible with the FPS300 Fiber Preparation Station, LDC
Series of Fiber Cleavers, and LFS4100 Fusion Splicer. For end-view imaging and alignment, an insert with an
indent for LED illumination (VHB00 or VHB05) is required. This mode of operation allows for alignment of the
cores of polarization-maintaining, eccentric-core, and microstructured specialty fibers. These LED illumination
inserts are also compatible with the LFS4100 Fusion Splicer.
Fiber Holder Insert
Side 1 Accepted Diameter
(Min / Max)
Side 2 Accepted Diameter
(Min / Max)
VHB00
57 µm / 759 µm
N/A
VHB05
410 µm / 1008 µm
560 µm / 1269 µm
VHA00
57 µm / 759 µm
275 µm / 970 µm
VHA05
410 µm / 1008 µm
560 µm / 1269 µm
VHA10
812 µm / 1515 µm
1036 µm / 1770 µm
VHA15
1288 µm / 2022 µm
1534 µm / 2268 µm
VHA20
1772 µm / 2505 µm
2032 µm / 2944 µm
VHA25
2278 µm / 3029 µm
N/A
VHA30
2609 µm / 3198 µm
N/A
Figure 57
Acceped Outer Diameters for Fiber Holder Top Inserts
8.2. Bottom Inserts
Fiber holder bottom inserts sit in the bottom section of the fiber holding blocks and come in a variety of groove
sizes. They can be used to clamp the cladding, coating, or buffer of the fiber. The top inserts (sold above) and
bottom inserts can be paired in a variety of combinations to accommodate all fiber sizes compatible with the the
glass processor, as shown in Figure 60.
There are two types of bottom inserts. The bottom inserts for fibers with cladding or buffer diameters up to 1.047
mm (indicated with Item #'s starting with VHF) are transfer inserts; they allow for a single fiber to be transferred
between the Vytran FPS300 Fiber Preparation Station, LDC400 Series of Fiber Cleavers, and glass
processors without loss of positional reference. All of these transfer inserts require the VHT1 transfer clamp; the
transfer inserts for diameters ≤550 µm also require a graphite V-groove.
Fiber Holder Insert
Side 1 Accepted Diameter (Min / Max)
VHF160
112 µm / 208 µm
VHF250
177 µm / 320 µm
VHF400
279 µm / 519 µm
VHF500
346 µm / 795 µm
VHF750
516 µm / 1047 µm
Figure 58
Acceped Outer Diameters for Fiber Holder Transfer Inserts
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