分光比可调的V形槽光纤耦合器

TUNABLE FIBER COUPLING SPLITTER USING AN EMBEDDED V-GROOVE

本文提出并分析了V形槽光纤耦合器进行光束耦合的可能，认为纤芯和包层的折射率一定时对应确定的a值，此时通过槽面折射法可以达到理想的分光比可调的耦合分束目的，并给出该类器件分光比的表达式．采用槽面内反射方法只能进行耦合而不能分束．

The possibilities of coupling and splitting using an embedded V-groove are presented and analyzed in this paper. While the incident beam is refracted on the surface of the groove, keeping the angle a at a special value which is determined by the refractive indexes of core and cladding,efficient coupling and tunable splitting ratio can be achieved. The expression of the splitting ratio of this device is shown. The beam can be coupled into one side of the core of the fiber,but it can't be splitted into the other side through inner reflecting on the surface of the groove.