LSSS-OF FOR. Zero Water Peak Single-Mode Optical Fiber. (Reference: ITU-T G.652.D) Prepared by Eun Kyung Min Engineer Passive Solution Team

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1 PAGE : 1 OF 6 LSSS-OF FOR Zero Water Peak Single-Mode Optical Fiber (Reference: ITU-T G.652.D) Prepared by Eun Kyung Min Engineer Passive Solution Team Checked by Yu-Hyoung Lee Manager Passive Solution Team Approved by Min Son Senior Manager Passive Solution Team

2 PAGE : 2 OF 6 1. General 1.1 Scope This specification includes proposed functional design criteria, generic mechanical and optical requirements, desired features, and test methods for single mode fiber This premium product is designed to provide improved performance over the entire wavelength range from 1280 nm to 1625 nm by removing the hydroxyl (OH) ions around 1383nm attenuation peak from the standard single-mode fiber This optical fiber meets the ITU-T G.652.D requirements The optical fiber shall be step-index single-mode and a matched cladding design single mode fiber made of high grade silica (SiO 2 ) material with a nominal coating diameter of 245 μm mechanically strippable acrylate The optical fiber is a non-dispersion shifted single mode fiber with a nominal mode field diameter of 9.2 μm. 1.2 Application This optical fiber is suitable for any applications requiring single mode fiber, including long haul telephony, metropolitan, loop feeder and cable television, private premises and etc This optical fiber is usable to open a new operating window around 1400nm (E-band) removed water peak providing lower chromatic dispersion compared to the C-band This optical fiber is fully compatible with standard single mode fiber due to the same other characteristics This optical fiber offers network design needed by carriers considering future requirements involving multi channel serviced such as coarse wavelength division multiplexing (CWDM). 2. Optical Performance 2.1 Attenuation Attenuation Coefficient: 0.34 db/km at 1310 nm 0.31 db/km at 1383 nm* 0.21 db/km at 1550 nm 0.24 db/km at 1625 nm * The value after hydrogen aging in accordance with IEC

3 PAGE : 3 OF 6 Long length single mode fiber attenuation measurements are Spectral attenuation of cutback measurement according to EIA/TIA If OTDRs are used, measurements shall be made bi-directionally and the results shall be averaged Attenuation versus Wavelength: The attenuation for wavelength region 1 to 2 dose not exceeds the attenuation at 3 by more than db/km. 1 [nm] Attenuation vs. Wavelength 2 [nm] 3 [nm] [db/km] Attenuation with Bending: Φ=60 mm, 100 turns at 1550 nm & 1625 nm, 0.05 db This induced attenuation due to fiber wrapped around a mandrel of a specified diameter (Φ). It shall be made in accordance with EIA/TIA Attenuation Uniformity (point discontinuity): 0.05 db at 1310 nm &1550 nm Attenuation uniformity shall be measured at nm for single mode fibers in accordance with EIA/TIA Measurements shall be made bidirectionally and the results shall be averaged. 2.2 Cut-off Wavelength Cable cut-off wavelength ( ccf ): 1260 nm Test method shall be made in accordance with EIA/TIA Mode-field diameter: 9.2 ± 0.4 μm at 1310 nm Test method shall be made in accordance with EIA/TIA A or EIA/TIA Chromatic dispersion Zero Dispersion Wavelength ( 0 ):

4 PAGE : 4 OF Dispersion Slope (S 0 ): ps/(nm 2 km) Max. Dispersion: 3.5 ps/nm.km at 1285 ~ 1330 nm 18 ps/nm.km at 1550 nm Test method shall be made in accordance with EIA/TIA , EIA/TIA or EIA/TIA Polarization mode dispersion (PMD): 0.1 ps/ km (Link Design Value) 3. Geometrical Performance 3.1 Glass Geometry Cladding Diameter: μm Cladding Non-Circularity: 0.8 % Core to Cladding Concentricity: 0.5 μm Test method shall be made in accordance with EIA/TIA Coating Geometry Coating Diameter: μm (uncolored fiber) The primary layer shall be coated on cladding with nominal diameter of 190 μm. For protecting the primary layer, the second layer shall be harder than primary coating layer. Coating diameter measurement shall be made in accordance with EIA/TIA , or EIA/TIA Coating Cladding Concentricity: < 12 μm 3.3 Fiber curl The radius of curvature of an optical fiber should be greater than 4 meter Test method shall be made in accordance with EIA/TIA Mechanical Performance 4.1 Tensile Proof Test The entire length of fiber is subjected to a tensile proof stress equivalent to 100 kpsi (0.69 GN/m 2 ). Higher level of proof test is also available upon

5 PAGE : 5 OF 6 request. Individual fibers shall be proof-tested in accordance with EIA/TIA Environmental Performance Items Temperature Dependence (- 60 to +85 ) Temperature-Humidity Cycling (- 10 to +85 and 4% to 98% Relative humidity) Water immersion (23, 14 days) Dry Heat (85, 30 days) Damp Heat (85, 85%, 30 days) Induced Attenuation [db/km] 1310 nm 1550 nm 6. Reliability Performance 6.1 Dynamic Tensile Strength - Unaged: > 550 kpsi (3.8 Gpa) - Aged: > 440 kpsi (3.0 Gpa) Measurement shall be made in accordance with EIA/TIA Dynamic Fatigue Resistance Parameter (N d ): > 20 Measurement shall be made in accordance with EIA/TIA Coating strip force All our fibers meet the specification of strip force not less than 1.3 N (0.3 lbf) and not more than 8.9 N (2.1 lbf). Measurement shall be made in accordance with EIA/TIA Shipping 7.1 Packing

6 PAGE : 6 OF Every spool shall be wrapped with a suitable material to protect the fiber from dust, damages loosening during transport Standard Reel length: more than 6.3km per spool Other length is available upon request Our bobbin is compatible with any other bobbin for cabling and covered with a foam pad to protect the inner layer of fiber from damage. The inner end is able to access more than 5 meters for testing Reels will be placed into a compartment heavy walled cardboard shipping container. Each reel will be packaged by plastic bag with silica gel to resist moisture and dust. 7.2 Documentation Test result of each spool will be attached with shipping spool Every spool has a unique identification. = End of specification = Version No. Date Editor Remark 00 OCT. 27, 2009 E.K. Min New Specification (Reference spec: LSST )