The Application of Pulsed Laser Welding in Optical Unit Splicing

摘要

The existing Submarine Cable are usually made up of stainless steel tube optical fiber unit structure. Because of the limitation of fiber length and equipment of the production of optical fiber unit, a full length of the fiber unit can't meet the requirement of the lager length Submarine Cable or Photoelectric Composite Cable. So the method of tube splicing was needed to extend the length of single fiber unit. In this paper a method of pulsed laser welding was applied in the splicing after finished splice tube. The tube was spliced by crimping after the fusion of fiber ends, and than weld the circular edge of the tubes' overlap. Test on the finished splice tube showed sufficient mechanical strength and excellent air tightness. Test on the inside fibers beside the welding showed that welding almost have no effect on the mechanical strength and fatigue performance of the fibers.