D. OPTICAL FIBER CABLE
6. Precautions for connection with low–loss optical junction adapter
D Features of and handling precautions for low–loss optical junction
When optical connectors for a conventional optical junction
adapter (A63L–0020–0002) are jointed, the facing ferrules(Note 1)
are located about 60 um from each other. This is because the optical
fiber of conventional PCF (plastic clad silica fiber) cables
(A66L–6001–0008, –0009, –0026) may protrude from the tip of
the ferrules (by up to about several um), resulting in the fiber
protrusion being damaged when the ferrules are butted against each
In the low–loss optical junction adapter, the ferrules are butted
against each other, thus greatly reducing the reduction in repeater
loss. Therefore, the two optical cables used with the low–loss
optical junction adapters must be dedicated to the adapters.
If a conventional PCF (plastic clad silica fiber) cable
(A66L–6001–0008, –0009, –0026) is used as even one of the two
optical fiber cables for joining the low–loss optical junction
adapter, both cables may be damaged, resulting in deteriorated
Ferrule: Movable metal at the tip of an optical connector; the
fiber is bonded to the ferrule.
D Features of low–loss optical cable (A66L–6001–0029)
A low–loss optical cable is selected from conventional PCF optical
cables (A66L–6601–0026). The selected cable offers low loss, and
its connector section is given special treatment; the fiber ends are
provided with a depression so that the ferrules can be butted against
each other. The two optical cables used with the low-loss optical
junction adapter must be of low–loss type.
D Appearance of the low–loss optical junction adapter and cable
(how to distinguish them from conventional types)
The body of the conventional optical junction adapter is black, but
that of the low–loss optical junction adapter is blue. In addition,
the protective cover(Note 1) of the conventional PCF optical cable
is black, but that of the low–loss optical cable is blue.