Dispersion shifted fiber

 

FEATURES
♦  Low dispersion and attenuation at 1550nm
♦  Triangular pedestal index profile
♦  Mechanically strippable acrylate coating with a 245 μm nominal outside diameter
♦  Primarily used in loose tube and slotted core cable designs
♦  Optimum for use in optical amplifier systems
 

OPTICAL CHARACTERISTICS
Characteristics	Conditions	Specified Values	Unit
Attenuation Coefficient	1310 nm	≦ 0.5	〔dB/km〕
	1550 nm	≦ 0.25	〔dB/km〕
Mode Field Diameter	1550 nm	7.4 ~ 9.0	〔µm〕
Fiber Cut-Off Wavelength		< 1500	〔nm〕
Cable Cut-Off Wavelength		< 1500	〔nm〕
Zero Dispersion Wavelength		1525 ~ 1575	〔nm〕
Zero Dispersion Slope		≦ 0.085	〔ps/(nm2·km)〕
Dispersion Coefficient	1525 – 1575 nm	≦ 3.5	〔ps/(nm·km)〕
PMD		≦ 0.2	〔ps/√km〕
BACKSCATTER CHARACTERISTICS
Attenuation Directional Uniformity		≦ 0.03	〔dB/km〕
Attenuation Uniformity		≦ 0.05	〔dB〕
Reflections		Not Allowed
Group Index of Refraction	1310 nm	1.4738
	1550 nm	1.4732
PHYSICAL CHARACTERISTICS
Core / Cladding Concentricity Error		≦ 0.8	〔µm〕
Cladding Diameter		125 ± 1	〔µm〕
Cladding Non-Circularity		≦ 2.0	〔%〕
Coating Diameter (UV Curable Acrylate)		245 ± 10	〔µm〕
Clad/Coat Concentricity Error		≦ 10	〔µm〕
Fiber curl		≧ 2	〔m〕
Proof Test		100	〔kpsi〕
Bend Induced Attenuation at 1625 nm		≦ 0.1	〔dB〕
(100 turns around a mandrel of 60 mm diameter)
Fatigue Resistance Parameter (nd)		20
Average Coating Strip Force /		≧ 105 / 140 (1.4)	〔g〕/ (N)
Peak Coating Strip Force
Length (Typical)		12.6～25.2	〔km〕
ENVIRONMENTAL CHARACTERISTICS
Temperature Dependence at 1310 nm and 1550 nm		≦ 0.05	〔dB/km〕
Induced Attenuation – 60°C to +85°C
Watersoak Dependence at 1310 nm and 1550 nm		≦ 0.05	〔dB/km〕
Induced Attenuation at 20°C for 30 days
Damp Heat Dependence at 1310 nm and 1550 nm		≦ 0.05	〔dB/km〕
Induced Attenuation at 85°C, 85%R.H., 30 days