
D.OPTICAL FIBER CABLE APPENDIX B-63943EN/02
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(7) Precautions for connection with low-loss optical junction adapter
• Features and attention in use of low-loss optical junction adapter
(A63L-0020-0004)
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 other.
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
characteristics.
NOTE
Ferrule: Movable metal at the tip of an optical
connector; the fiber is bonded to the ferrule.
Optical cable
Ferrule
Protective cover
Optical connector
• 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.
• 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.