Optical Fiber Characteristics

◎ Cable Material

Central Members:

☆ Solid or Stranded Steel(Option M or B):For high stength and flexibility in outerdoor cables is to be pulled or blown into ducts,the preferred central member material is steel.The steel is hot-rolled with anti-corrsion treatment.The steel central member is continuous throughout the cable length.It is coated with plastic to the diameter dictated by the cable geometry.Stranded steel is used when light cable flexibility is needed.
☆ Dielectric FRP (Option D) :The dielectric nature of glass fibers renders them immune to electromagnetic interference (EMI)and lighting .Fiberoptic cables can be laid in unprotected conduits and even in air handing spaces and plenums, as there is no danger of electrical shock.
In order to take advantage of the dielectric nature of the optic fibers,the cable should be fully dielectric.The recommended central strength member for most dielectric cables is made of fiber reinforced plastic (FRP).The FRP rod is coated when necessary with plastic to the diameter dictated by the cable geometry.In addison to being dielectric,FRP possesses high tensile strength and low weight.
Cables requiring high strength may additionally be reinforced with aramid yarn strength members beneath the jacket(see section on aramid yarn below) .
☆ Aramid Yarn (Central Member Option F,Jacket Option K) : The preferred central member for lightweight flexible indoor cables is plastic-cated aramid yarn.Aramid is a dielectric ,high modulus,low specific weight polymer that is used in the form of thin fiber yarn.
Aramid yarn can also be incorporated into the cable outer jacket as peripheral strength member.Aramid peripheral strength member are especially recommended for cables that are designed for aerial installation or for duct installation.The aramid -reinforced jacket is better able to support the stresses that develop during the aerial installation and during the duct installation.

Jacket Materials

☆ PE(Option P)
Used mostly for outerdoor applications.Superial Cables uses non reclaimed polyethylene containing carbon black and conforming to appropriate national and international standards.The material has been especially designed for use in cable jackets.It is characterizes by high tensial strength and resistance to abrasion.Polyethylene will not crack or become brittle at low temperature ,and will retain its mechanical properties and stability at high temperatures.
Due to the inclusion of carbon black in the formulation ,Polyethylene has extremely good aging properties and high UV and weather resistant to most chemicals and solvents.

☆ PVC(Option V)
Used mostly for indoor applications.The material is flexible and flame retardant,it will not allow fire to propagate along the cable when ignited.
The PVC used by Superior Cables is resistant to degredation from exposure to UV radiation PVC possesses high tensile strength and abrasion resistance.It will not crack or deteriorate when used indoors and at moderate temperatures.

☆ Halogen-Free,Flame-Retardant(Option H)
Used mostly for indoor applications.When exposed to fire it does not emit toxic,corrosive halogen gases and only low amounts of smoke .Meets flammability requirements of UL1581 and IEC-60332-1.Cable which meet the flammability requirements of IEC-60332-3 may be ordered.

◎ Cable Characteristic

The optical characteristics below pertain to cable fibers.
☆ SINGLE-MODE FIBERS

Parameter		Standard Single Mode Fiber per ITU-TG652*	Non-Zero Dispersion Shifted Fiber per ITU-TG652*		Units
Fiber Code		9	8
Attenuation,Loose Tube Cables @1310nm @1550nm @1625nm		Standard ≤0.35 ≤0.22 -	Metro Area ≤0.40 ≤0.24 ≤0.25	Long Haul - ≤0.25 ≤0.25	db/km db/km db/km
Attenuation Tight Buffer Cables @1310nm @1550nm		≤0.45 ≤0.35	- -		db/km db/km
Dispersion	between 1285 and 1350nm between1530 and 1565nm between 1565 and 1625nm	≤0.35 ≤18.0 -	- 2.0-6.0 4.0-9.8	- 2.0-6.0 4.0-11.2	ps/nmxkm ps/nmxkm ps/nmxkm
Zero Dispersion Wavelength		1311±11	-		nm
Mode Field Diameter @1300nm @1550nm		9.2±0.5 10.4±1.0	- 8.4±0.6	- 9.6±0.4	µm µm
Cable Cut-off Wavelength		≤1260	-		nm
Cladding Diameter		125±1.0	125±1.0	125±1.0	µm
Core/Cladding Concentricity Error		≤0.5	≤0.5	≤0.6	µm
Caldding None-Circularity		≤1.0	≤1.0	≤1.0	%
Coating Diameter		245±10	245±10	245±10	µm
Proof-Test Level		0.7	0.7		GN/m²

☆ MULTI-MODE FIBERS

Parameter	50/125		62.5/125	Units
Fiber Code	5		6
ISO/IEC11801 Classification⁽²⁾	OM2	OM3	OM1
Attenuation,Loose Tube Cables @850nm @1300nm	≤3.0 ≤1.0		≤3.2 ≤1.2	db/km db/km
Attenuation Tight Buffer and Semi-Tight Cables @850nm @1300nm	≤3.5 ≤1.2		≤3.5 ≤1.5	db/km db/km
Handwidth* @850nm @1300nm	≥500 ≥800	≥1500 ≥500	≥200 ≥500	mhzkm mhzkm
Numerical Aperture	0.20±0.015		0.275±0.015	-
Core Diameter	50±3		62.5±3	µm
Cladding Diameter	125±2		125±2	µm
Core Non Circularity	≤6		≤6	%
Cladding Non Circularity	≤2		≤2	%
Core/Cladding Offsct	≤3		≤3	µm
Coating Diameter	245±10		245±10	µm
Proof-Test Level	0.7		0.7	GN/m²

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