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光功率損耗的計算方法
日期：2026-04-11 22:04
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摘要：
光功率損耗的計算方法
Power Loss Budget Calculation
Power Loss Budget Calculation
The link attenuation (Optical Power Loss) must be calculated for each fiber cabling run. Copper testing is much easier as the limit line is the same regardless of length.
Allowable loss:
- Mated Connector : 0.75 dB
- Splice : 0.3 dB
- Cable @ 850nm : 3.5 dB/km
- Cable @ 1300nm : 1.5 dB/km
- Cable @ 1310 nm : 1.0 dB/km
- Cable @ 1550 nm : 1.0 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: 光功率損耗的計算方法
| Mated Connector | 0.75 dB |
| Cable @ 1300nm | 0.075 dB (1.5 dB / km) |
| Splice | 0.3 dB |
| Mated Connector | 0.75 dB |
| | |
| Power Loss Budget | 1.875 dB |
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.
Products such as the DSP-FTA, OMNIFiber and DTX-x*** Series will calculate the loss budget for you.
光功率損耗的計算方法
Products such as the DSP-FTA, OMNIFiber and DTX-x*** Series will calculate the loss budget for you.
光功率損耗的計算方法