Optical power budget
The optical power budget in a
signal strength (optical power) is available at the receiver. In optical power budget attenuation is specified in decibel (dB) and optical power in dBm
.
The amount of optical power launched into a given fiber by a given transmitter depends on the nature of its active optical source (
transmission
losses for the type of fiber to be used, and the required signal strength for a given level of performance.
In addition to
cable
.
- LT = αL + Lc + Ls
Definitions:
- LT - Total loss
- α - Fiber attenuation
- L - Length of fiber
- Lc - Connector loss
- Ls - Splice loss
Passive optical networks use optical splitters to divide the downstream signal into up to 32 streams, most often a power of two. Each division in two halves the transmitted power and therefore causes a minimum attenuation of 3 dB ( ≈ 10−0.3).
References
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 22 January 2022.