Military / Navy

The demand for bandwidth continues to grow as shipboard operations become increasingly automated. Fiber optic networks are becoming the main communications system aboard military surface ships as well as submarines. Besides immunity to electromagnetic interference (EMI), fiber optics offers significant weight and space advantage.


Due to the specific environment there is a need for ruggedized cables and connectors as well as simpler field connectorisation.  Radiation hard fibers are also requested for sensitive communication systems.

Besides communication, fiber optic sensors are largely used such as acoustic sensors for submarine, magnetometers, pressure or vibrations sensors, etc.

Main Issues

Environment, weight, packaging

T° -55 +125

Hermeticity and Pressure


Spool for UAV (Underwater Autonomous Vehicule)

Unmanned vehicles need a bidirectional high quality communication system to bring back video signal or other sensor information from the vehicle and to transmit command signals to the vehicle. When radio communication cannot be used due for instance to underwater operation a fiber optic tether is a very effective solution. For UAV (Underwater Autonomous Vehicule) SEDI-ATI manufactures a system which can avoid a bulky and heavy cable tether. It is composed of a very compact and light package in which is included a precision wound untwisted optical fiber allowing long distance pay out. This disposable system is ideal when weight or small dimensions are important factors.


The coating of the fiber could be reinforced for optimum resistance allowing high speed payout. The deployable side of the spool is equipped with a connector to be connected to the control station and the opposite fiber end is pigtailed with a 1.8mm standard jacket to be connected to an hermetic feedthrough on the vehicle. The spool length could be up to 30 km for the underwater version. Other designs can be proposed on request.

Achievements / Products

Using optical fibers in harsh or even extreme environment implies specific design to operate in conditions such as radiations, high temperature, high pressure or very diverse mechanical constraints. Products are designed according customer’s specifications and manufactured under ISO 9001 quality process.