Raw material for fiber optic ,both For G.657.A1 and G.657.B3 Fiber Preform.
TOEM fiber optic preforms have good transmission performance, which can provide higher transmission speed and larger bandwidth, thus better meeting the needs of users.
Product Characteristics:
| Chemical composition |
Core layer:SiO2+GeO2 Cladding layer:SiO2 |
| Index profile |
Step Type & Matching Cladding Type |
| Dia. of Preform |
80~150mm |
| Dia.Tolerance |
≤15mm |
| Preform Length |
≤2000mm |
| Preform non Circularity |
≤1.5% |
| Concentricity Error |
≤0.6% |
| Bending Degree |
≤0.1% |
G.657.B3 Parameter:
| Fiber optic properties |
Standard data |
Typical value |
| Bare fiber diameter |
125±0.7μm |
125.1μm |
| Attenuation |
≤0.35dB/km(1.31μm) |
0.335dB/km |
| ≤0.21dB/km(1.55μm) |
0.190dB/km |
| ≤0.35dB/km(1.38μm) |
0.285dB/km |
| Mode field diameter |
8.6±0.4μm |
8.50μm |
| Cutoff wavelength |
1150~1330nm |
1280nm |
| Zero dispersion wavelength |
1300~1324nm |
1310nm |
| Core concentricity error |
≤0.5μm |
0.35μm |
| Cladding non Circularity |
≤0.8% |
0.4% |
| Macrobending loss |
5mm radius
1 circle |
≤0.15(1550nm) |
0.08 dB |
| ≤0.45(1625nm) |
0.24 dB |
G.657.A1 Parameter:
| Fiber optic properties |
Standard data |
Typical value |
| Bare fiber diameter |
125±0.7μm |
125.1μm |
| Attenuation |
≤0.35dB/km(1.31μ
m) |
0.335dB/km |
≤0.21dB/km(1.55μ
m) |
0.190dB/km |
≤0.35dB/km(1.38μ
m) |
0.285dB/km |
| Mode field diameter |
9.2±0.4μm |
9.05μm |
| Cutoff wavelength |
1150~1330nm |
1280nm |
| Zero dispersion wavelength |
1300~1324nm |
1310nm |
| Core concentricity error |
≤0.5μm |
0.35μm |
| Cladding non Circularity |
≤0.8% |
0.4% |
| Macrobending loss |
10mm radius
1 circle |
≤0.75(1550nm) |
0.16 dB |
| ≤1.5(1625nm) |
0.48 dB |
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