Optical submarine repeater

摘要

A circuit unit including heating components is accommodated in a space defined by a cylindrical metal case and a pair of case end plates closing the opposite ends of the metal case. The metal case is accommodated in an insulated space defined by a PE cylinder formed of insulating resin such as polyethylene and a pair of PE end plates closing the opposite ends of the PE cylinder. The PE cylinder is accommodated in a pressure-resistant housing through a first radiating/cushioning member. A radiating disk biased by a second radiating/cushioning member is kept in pressure contact with each PE end plate kept in close contact with the corresponding case end plate.