Development of a Fiber Optic Micro-Cable Used in Deep Sea

The design and manufacturing process of fiber optic micro-cable for deep sea application is presented,the performance of this cable,such as operation depth,is tested.The testing results show that the diameter of the cable is 0.8 mm,the attenuation coefficient is less than 0.40 dB/km at 1 310 nm,and less than 0.30 dB/km at 1 550 nm,the ultimate tensile strength is more than 500 N.It is proved that this cable can be used in water depth of 7 km,and offers good comprehensive performance.