Introduction

                                   ■   The fibers are placed in a loose tube made of PBT. The tubes
                                        are filled with a water-resistant filling compound. A steel wire
                                        sometimes sheathed with PE for cable with high fiber count,
                                        locates in the center of core as a metallic strength member.
                                        Tubes (and fillers) are stranded around the strength member
                                        into a compact and circular cable core. The cable core is filled
                                        with the filling compound to protect it from water ingress, over
                                        which a thin PE inner sheath is applied. After the PSP is longitudinally
                                        applied over the inner sheath, the cable is completed with a PE
                                        outer sheath.

                                   G652D fiber information

                                   ■   Mode field diameter (1310nm):9.2μm±0.4μm.

                                   ■   Mode field diameter (1550nm):10.4μm±0.8μm.

                                   ■   Cladding diameter:125μm±1.0μm.

                                   ■   Coating diameter:245μm±7μm.

                                   ■   Cut off wavelength of cabled fiber (λcc): ≤1260μm 

                                   ■   Attenuation at 1310nm:≤0.35dB/km.

                                   ■   Attenuation at 1550nm:≤0.21dB/km.
                                   ■   Bending loss at 1550nm (100 turns, 30mm radius):≤0.05dB.
                                   ■   Dispersion in the range 1288 to 1339nm：≤3.5ps/(nm·km).
                                   ■   Dispersion at 1550nm:≤18ps/(nm·km).
                                   ■   Dispersion slope at zero dispersion wavelength:≤0.092ps/(nm2·km).