The GYTY53 optical cable consists of 250µm optical fibers inserted into loose tubes made of high-modulus material, with the tubes filled with a waterproof compound. At the center of the cable core is a metal reinforcing core; for certain core counts, a layer of polyethylene (PE) is extruded over the metal reinforcing core. The loose tubes (and filler ropes) are twisted around the central reinforcing core to form a compact and round cable core, with the gaps within the core filled with a water-blocking filler. A polyethylene inner sheath is extruded over the cable core, and then double-sided plastic-coated steel tape (PSP) is longitudinally wrapped before extruding the polyethylene sheath to form the cable.

• 1. Product Standards

• • YOFC's GYTY53 optical cable conforms to YD/T 901 and IEC 60794-1 standards.

• 2. Product Features

• - Single steel wire center reinforcing core

  - The loose sleeve is filled with a special waterproof compound

  - Fully filled cable core

  - Double-sided plastic-coated steel tape (PSP) improves the optical cable's resistance to moisture penetration.

  - Excellent water-blocking materials prevent longitudinal water seepage into the optical cable

• It has excellent mechanical properties and temperature characteristics.

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

• The tube was filled with a special grease, which provided crucial protection for the optical fiber.

• Good compressive strength and flexibility

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

• Structural parameters

• Fiber optic cable model (Incrementing by 2 fibers)	fiber optic number	Number of sleeves	Number of filler ropes	Reference fiber optic cable weight (kg/km)	Permissible tensile force Long-term/Short-term (N)	Allowable flattening force Long-term/Short-term (N/100mm)	Bending radius Static/Dynamic (mm)
  GYTY53-2~6Xn	2~6	1	5	160	1000/3000	1000/3000	12.5D/25D
  GYTY53-8~12Xn	8~12	2	4	160
  GYTY53-14~18Xn	14~18	3	3	160
  GYTY53-20~24Xn	20~24	4	2	160
  GYTY53-26~30Xn	26~30	5	1	160
  GYTY53-32~36Xn	32~36	6	0	160
  GYTY53-38~48Xn	38~48	4	1	174
  GYTY53-50~60Xn	50~60	5	0	174
  GYTY53-62~72Xn	62~72	6	0	185
  GYTY53-74~84Xn	74~84	7	1	214
  GYTY53-86~96Xn	86~96	8	0	214
  GYTY53-98~108Xn	98~108	9	1	245
  GYTY53-110~120Xn	110~120	10	0	245
  GYTY53-122~132Xn	122~132	11	1	281
  GYTY53-134~144Xn	134~144	12	0	281
  GYTY53-146~216Xn	146~216	13~18	5~0	281

  Storage and operating temperature: -40℃ to +70℃

• Optical properties

• Fiber type	attenuation （+20℃）				bandwidth		Numerical aperture	Optical cable cutoff wavelength
  	@850nm	@1300nm	@1310nm	@1550nm	@850nm	@1300nm
  G.652	---	---	≤0.36dB/km	≤0.22dB/km	---	---	---	≤1260nm
  G.655	---	---	≤0.40dB/km	≤0.23dB/km	---	---	---	≤1450nm
  50/125µm	≤3.0dB/km	≤1.0dB/km	---	---	≥500MHz·km	≥500MHz·km	0.200±0.015 NA	---
  62.5/125µm	≤3.3dB/km	≤1.0dB/km	---	---	≥200MHz·km	≥500MHz·km	0.275±0.015 NA	---

• Applicable to: pipelines, overhead lines, direct burial