II. Core Performance Indicators of Single-Mode Fiber Don't be misled by appearances when purchasing; these intrinsic characteristics are key:
Attenuation Coefficient: High-quality fiber should have an attenuation of less than 0.2 dB/km at 1550nm wavelength.
Mode Field Diameter: 9-10 micrometers is ideal for better equipment compatibility.
Bending Performance: Minimum bending radius of 30mm while maintaining low loss.
Temperature Characteristics: Attenuation change should be less than 0.05 dB/km within the range of -40℃ to 70℃.
III. Practical Tips for Selecting Based on Needs Different scenarios require different priorities:
Long-haul trunk lines: Prioritize low water peak fiber; attenuation at the 1550nm window must be exceptionally low.
Data centers: Focus on bending insensitivity characteristics for high-density cabling.
Special environments: Chemical plant areas require corrosion-resistant coatings; cold regions require freeze-cracking resistant designs.
Upgrade Compatibility: Choosing the G.652.D type, which supports future 100G/400G transmission, is more reliable.