Industrial Cable Manufacturer

Structure of Long Distance Optical Fiber Composite Cable Optical unit Strength member Loose tube Conductor Insulating layers Tape layer Outer sheath Armored layer Description of long distance optical fiber composite cable

The long distance optical fiber composite cable usually adopts an all-dielectric form, which means the strength member is nonmetallic.

The BBU+RRU remote base station requires fewer cores of fiber optic cable, so it is more flexible for combination. Its opto-electronic hybrid structure can be used in some individual applications.

As to the design of the structure, the long distance optical fiber composite cable adopts tight-buffered optical fiber to reduce its diameter and further increase its tensile strength and side-pressure resistance performance. It is convenient to connect the end of optical fiber with connectors.

We use aramid yarn to fabricate the strength member to promote the drawing force for short term and toughness of optical cable.

Considering the various indoors service conditions, we adopt LZSH materials to fabricate its sheath.

Parameter 1. Technical parameter

Item	Content	Value
	Number of cores	2	4	8	12
Reference outer diameter	mm	11.5	15.0	25.0	33.0
Tight-buffered optical fiber	Material	LSZH
	Outer diameter /mm	(0.6/0.9)±0.05
Strength member	Material	aramid yarn
Loose tube	Outer diameter/mm	2.0±0.1
	Thickness/mm	≥0.3
Direct-current resistance of single conductor	(Ω/100m)	13.3
Feeder line	Sectional area of conductor /mm²	1.5
Central strength member	Material	FRP
Tape layer	Material	Polyester tape, non-woven polyester tape, water blocking tape, etc.
Outer sheath	Material	LSZH/PVC/TPU/PE
Range of operating temperature	℃	-40 ~ +70
Tensile force	Short term/long term / N	1000/500
Flattening	Short term/long term / N	2000/1000
* The color and color spectrum of fiber optics are formulated according to identification tables. * We can change the quantity of fiber optic and specification of feeder line according to customers' requirement. * The outer diameter and weight of optical cable are typical values, and they will change in different structures.

2. Characteristic of optical fiber

		G.652.D	G.657A2	50/125μm	62.5/125μm
Attenuation	@850nm	-	-	≤3.0dB/km	≤3.0dB/km
	@1300nm	-	-	≤1.0dB/km	≤1.0dB/km
	@1310nm	≤0.36dB/km	≤0.36dB/km	-	-
	@1550nm	≤0.22dB/km	≤0.23dB/km	-	-
Bandwidth	@850nm	-	-	≥500MHz·km	≥200MHz·km
	@1300nm	-	-	≥1000MHz·km	≥600MHz·km
Fiber cutoff wavelength		≤1260nm	≤1260nm	-	-
Polarization mode dispersion	Single optical fiber	≤0.20ps/√km	≤0.20ps/√km	-	-
Link value(M=20, Q=0.01%)		≤0.10ps/√km	≤0.10ps/√km	-	-

3. Main machinery and environment performance

Item	Inspection standard	Specified value	Requirements
Pull	IEC 60811-1-1	According to technical parameter	Additional attenuation≤0.03dB
Flatten	IEC 60811-1-1	According to technical parameter	Additional attenuation≤0.03dB
Backward and forward bending	IEC 60811-1-1	Load: 40N 15 times	Additional attenuation: single-mode≤0.4dB; multi-mode≤0.6dB
Twisting	IEC 60811-1-1	Load: 40N 10times	Additional attenuation: single-mode≤0.4dB; multi-mode≤0.6dB
temperature recycle test	IEC 60794-1-2-F1	-40℃ ~+70℃	Additional attenuation: single-mode≤0.5dB; multi-mode≤0.3dB
voltage test	IEC 60227-1	applied voltage: DC2.5Kv, 5min	Every single wire will not be broken down after being shield with other core wires.
insulation resistance	IEC 60227-1	+20℃, DC 500v, 1min	The insulation resistance of the single wire, being shield with other core wires: ≥10MΩ*km
Combustion performance	IEC 60332-1-2	Fire resistance	Every single wire can be burnt vertically.
		Density of the smoke	Light transmittance ≥50%
		Corrosiveness	PH of the gas when burning≤4.3; electric conductivity≤10μs/mm
* The monitoring of all optical fiber attenuation's change is operated in wavelength of 1550nm.

Features
This product has the advantages of convenient installation, energy conservation and environment protection. The power supply comes from machine room, which is segregated with alternating current. The stable power supply will effectively eradicate power cutoff accidents. This product can realize the automatic disconnection of short circuit, shut off to reduce the risks of electric leakage.