For example , typical 1550 nm single mode fiber has a loss of 0.4 dB per kilometer .
where the dB loss per kilometer is a function of the type of fiber and can be found in the manufacturer 's specifications .
Typical 1550 nm single mode fiber has a loss of 0.4 dB per kilometer .
where the dB loss per kilometer is a function of the type of fiber and can be found in the manufacturer 's specifications .