HIGH EFFICIENCY PUMP SIGNAL COMBINER FOR HIGH POWER FIBER AMPLIFIER AND LASER APPLICATIONS

摘要

PROBLEM TO BE SOLVED: To provide a high efficiency optical combiner for high power fiber amplifier and laser applications capable of minimizing core region distortions in the area where fusion splicing between an input tapered fiber bundle and output fiber is joined.SOLUTION: The thickness of a glass cladding layer 14 of an output fiber 12 in the splice region is reduced so that a core-to-core splice is formed and so that any necked-down region where the glass flows to join core regions 16 is essentially eliminated.SELECTED DRAWING: Figure 5