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. An Aluminum Polyethylene
                                        Laminate is applied around the cable core, which is filled with the
                                        filling compound to protect it from water ingress. Then, the cable
                                        is completed with a PE 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).