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The Toolbox — Standards
Fiber Optics
IEC fiber optic connector loss standards, attenuation specs, bend radius, and cleaning requirements.
| Specification | Value / Notes |
|---|---|
| Maximum connector insertion loss (IEC 61300) | 0.75 dB |
| Typical good connector insertion loss | 0.3 dB or less |
| Typical fusion splice loss | 0.02 – 0.1 dB |
| Typical mechanical splice loss | 0.3 – 0.5 dB |
| Single-mode fiber core diameter | 9 microns (μm) |
| Multimode fiber core diameter (OM1/OM2) | 62.5 microns (μm) |
| Multimode fiber core diameter (OM3/OM4) | 50 microns (μm) |
| Single-mode cladding diameter | 125 microns (μm) |
| Single-mode attenuation at 1310 nm | ≤ 0.35 dB/km (ITU-T G.652) |
| Single-mode attenuation at 1550 nm | ≤ 0.20 dB/km (ITU-T G.652) |
| Multimode attenuation at 850 nm (OM3) | ≤ 3.0 dB/km |
| Minimum bend radius (single-mode) | 30 mm |
| Minimum bend radius (multimode) | 25 mm |
| Cleaning solvent purity | 99% isopropyl alcohol minimum |
| Return loss — PC connector | ≥ 40 dB |
| Return loss — APC connector | ≥ 60 dB |
| Operating wavelengths (single-mode) | 1310 nm and 1550 nm most common |
| Operating wavelengths (multimode) | 850 nm and 1300 nm |
| IPA cleaning purity minimum | 99% isopropyl alcohol |