Optical Fiber Specifications

NZDS Single-Mode Optical Fiber

Standard G.655

1. General

This specification covers the design requirements and performance standards for the optical fiber described below.  This fiber is used in the optical cables. The features described in this document are intended to provide information on the performance of the optical fiber and aid in handling and use.  Refer to the appropriate cable specification for details regarding the finished cable's performance.

1.1       Fiber Description  

The G.655 Single-Mode optical fiber is a Non-Zero Dispersion Shifted fiber with a glass core, glass cladding and dual acrylate protective coatings.  This fiber is optimized for operation at the 1550 nm transmission window.  It is fully compatible with commercially available splicing and connector products and can be spliced to other commercially available SM fibers.

SM fiber is ideal for long haul, telephone, video or data networks. 

1.2       Quality

4SProducts ensures a continuing level of quality in our optical fiber products through multiple programs including ISO 9000.  Quality product is guaranteed and is evident in the optical fiber cable products supplied by 4SProducts.

1.3       Reliability

4SProducts ensures product reliability through rigorous qualification testing of each product family to meet or exceed industry standards.  Both initial and periodic qualification testing are performed to assure the fiber's performance and durability in the field environment.

 

2. Fiber Design

2.1 General


Only the highest quality Single-Mode fibers in our cables. The step index glass fibers are coated with dual acrylate protective coatings to provide the necessary bending and tensile strength required for handling in the field and to ensure maximum fiber lifetime through increased reliability. Colored ink coatings are applied per the detailed cable specification.


 

2.2       Construction

SINGLE MODE OPTICAL FIBER
Fiber Region Property Specification
Core (Glass)

Diameter

Non-Circularity

Typically 9.6 ± 0.4 µm

£ 0.5 µm
Cladding (Glass)

Diameter

Non-Circularity

125 ± 1.0 µm

£ 1.0%
Coating

Material

Inked Diameter

Coating/Cladding offset

UV-Acrylate
245 ± 5 µm
< 12 µm

 

3. Fiber Characteristics

3.1       Optical Characteristics

SINGLE-MODE Optical Fiber
Property Specification
Maximum Individual Fiber Attenuation at 1310 / 1550 nm £ 0.22 dB/km
Point Discontinuities at 1550 nm £ 0.10 dB
Attenuation Change
vs. Wavelength		 1525 to 1575 nm £ 0.05 dB/km
Attenuation Change
vs. Bending		 100 wraps / 75 mm
1 wrap / 32 mm		 £ 0.05 dB
 £ 0.50 dB
Zero Dispersion Wavelength 1520 nm
Nominal Mode Field Diameter 1550 nm 9.6 µm
Mode Field Diameter Tolerance ± 0.4 µm
Cabled Fiber Cutoff Wavelength (lcc) < 1480 nm
Group Index of Refraction 1550 nm 1.465
Polarization Mode Dispersion 1550 nm < 0.1 ps/Ökm

3.2       Mechanical Characteristics

SINGLE-MODE Optical Fiber
Property Specification
Proof Test Stress 100 kpsi (0.69 GPa)
Fiber Curl Radius

Internal

 ³ 4.0 meters

 

4. Testing & Inspection

The optical properties of all fibers are measured prior to cable manufacturing with bi-directional OTDR and remain traceable through-out the manufacturing process and the lifetime of the cable.  After cabling, 100% of all fibers in each length of cable are measured at all operating wavelengths.  The attenuation for each fiber is recorded.