Max distance of multimode fiber without repeater station

[SorenaJ]

I have the task to design a system with a multimode fibre optic cable that is 45 km long, but no repeater station. Are optical amplifiers repeater stations? How to get the signal to carry for 45 km? I read that multimode fibres are quite short-range.

 

[berkeman]

I have the task to design a system with a multimode fibre optic cable that is 45 km long, but no repeater station. Are optical amplifiers repeater stations? How to get the signal to carry for 45 km? I read that multimode fibres are quite short-range.

http://fiber-optic-catalog.ofsoptics.com/Asset/Multimode-or-Single-Mode.pdf

 

[rbelli1]

What bandwidth do you need?

Why is the requirement for no repeaters part of the specification? If it is due to no power being available in the middle then optical amplifiers are also not possible as they require a power source.

It is unlikely that you will be able to transmit at any useful data rate using multi-mode fiber at that length.

As an alternative can you use a microwave link?

BoB