Stranded loose jacket unarmoured fiber optic cable

The structure of the GYTA fiber optic cable is that a 250μm fiber is sleeved into a loose tube made of high-modulus material, which is filled with a waterproof compound. In the center of the core is a metal reinforcing core, and for some core cables, a layer of polyethylene (PE) is squeezed out of the metal reinforcing core. The loose tube (and filler rope) are twisted around the central reinforcing core to form a compact and rounded core, and the gaps within the core are filled with water-blocking filling. Plastic-coated aluminum tape (APL) is longitudinally wrapped and then extruded into a polyethylene sheath to form a cable.

Description

Product standards

YOFC’s GYTA fiber optic cables comply with YD/T 901 and IEC 60794-1 standards.

Features:

• Very good mechanical and temperature properties

• The loose tube material itself has good hydrolysis resistance and high strength

• The tube is filled with special paste to protect the optical fiber

• Specially designed tight cable structure to effectively prevent the casing from retracting

• The PE sheath has very good resistance to ultraviolet radiation

• The following measures are taken to ensure the waterproof performance of the cable:

– Single wire center reinforcing core

– The loose tube is filled with a special waterproofing compound

– Full core filling

– Plastic-coated aluminium tape (APL) moisture barrier

Structural parameters

Fiber optic cable model (in 2-fiber increments)	Number of fibers	Number of casings	Number of fill ropes	Reference cable weight （kg/km）	Tensile force is allowed Long-term/short-term (N)	Allowable squashing force Long-term/short-term (N/100mm)	Bend radius Static/Dynamic (mm)
GYTA-2~6Xn	2~6	1	4	76	600/1500	300/1000	10D/20D
GYTA-8~12Xn	8~12	2	3	76
GYTA-14~18Xn	14~18	3	2	76
GYTA-20~24Xn	20~24	4	1	76
GYTA-26~30Xn	26~30	5	0	76
GYTA-32~36Xn	32~36	6	0	85
GYTA-38~48Xn	38~48	4	1	90
GYTA-50~60Xn	50~60	5	0	90
GYTA-62~72Xn	62~72	6	0	113
GYTA-74~84Xn	74~84	7	1	136
GYTA-86~96Xn	86~96	8	0	136
GYTA-98~108Xn	98~108	9	1	163
GYTA-110~120Xn	110~120	10	0	163
GYTA-122~132Xn	122~132	11	1	190
GYTA-134~144Xn	134~144	12	0	190
GYTA-146~216Xn	146~216	13~18	5~0	190
GYTA-288Xn	288	24	0	239

Storage and use temperature: -40°C to +70°C.

Optical properties

Fiber type	attenuation （+20℃）				bandwidth		Numerical aperture	Fiber optic cable cut-off wavelength
Fiber type	@850nm	@1300nm	@1310nm	@1550nm	@850nm	@1300nm	Numerical aperture	Fiber optic cable cut-off wavelength
G.652	—	—	≤0.36dB/km	≤0.22dB/km	—	—	—	≤1260nm
G.655	—	—	≤0.40dB/km	≤0.23dB/km	—	—	—	≤1450nm
50/125µm	≤3.3dB/km	≤1.2dB/km	—	—	≥500MHz·km	≥500MHz·km	0.200±0.015 NA	—
62.5/125µm	≤3.5dB/km	≤1.2dB/km	—	—	≥200MHz·km	≥500MHz·km	0.275±0.015 NA	—