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The efficiency of coupling between DH lasers and tapered launchers with singlecore, clad-core and double core has been calculated by using skew ray tracing technique. 用非子午面光线追迹法，对单芯锥、套层锥以及双芯锥光纤和DH激光器的耦合效率，双芯锥的分光比做了数值计算。