Fiber Optic Power Loss Budget - FTI Packages

With the FTI Packages,  the link attenuation (Optical Power Loss) must be calculated for each fiber cabling run.
 
Allowable loss: 
  • Connector : 0,75 дБ 
  • Splice : 0,3 дБ 
  • Cable @ 850nm : 3,5 db / km  
  • Cable @ 1300nm : 1,5 dB / km  
Assuming a 50 meter link had two connectors & a splice. We decide to measure at 1300 nm, the affordable power loss budget would be calculated in the following way:   

Mated Connector

0,75 дБ

Cable @ 1300nm

0,075 dB (1,5 dB / km)

Splice

0,3 дБ

Mated Connector

0,75 дБ

Power Loss Budget

1,875 дБ



Summary:
Do not accept a Power Loss Reading without a calculated Power Loss Budget. For certification to ANSI/TIA/EIA 568-B, ISO/IEC 11801 and EN50173, you must test at both wavelengths in one direction and record the allowable loss budget.

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- Fiber Testing