公开(公告)号：US4281891A

公开(公告)日：1981-08-04

申请号：US23917

申请日：1979-03-26

申请人： Tsuneo Shinohara ,  Hiroo Yonezu

发明人： Tsuneo Shinohara ,  Hiroo Yonezu

IPC分类号： G02B6/42 ,  G02B5/14

CPC分类号： G02B6/4207 ,  G02B6/4212

摘要： A device for coupling a laser beam to an end surface of an optical fiber comprises a beam converging lens, a holder for the fiber, a block of a solid material, and a mass of a binder between the block and the end surface and between the block and the holder. The lens and the holder are fixed to each other so as to make the laser beam focus on the end surface. Use is preferred of an arrangement comprising a first and a second holder in which the holders have axial lines, respectively, and hold a laser element for the laser beam and the lens with a beam axis of the laser beam and an optical axis of the lens rendered coincident with the respective axial lines and in which the holders are fixed to each other with the axial lines aligned. The arrangement is effective also in coupling the laser beam to a general transmission medium. Instead of using the arrangement, a lens holder may be fixed to the fiber holder and then to a laser element holder so as to make the laser beam focus on the optical fiber end surface. A nonreflecting coating is desirable on the block at a portion exposed to the incident laser beam either when the laser beam is incident onto the block with a small angle of convergence or when the block is thin. The solid material, the binder, and the optical fiber usually have an approximately equal refractive index.

摘要翻译： 用于将激光束耦合到光纤的端表面的装置包括光束会聚透镜，用于光纤的保持器，固体材料块和块与端表面之间的粘合剂块 块和持有人。 透镜和保持器彼此固定，以使激光束聚焦在端面上。 使用优选的是包括第一和第二保持器的装置，其中保持器分别具有轴线，并且保持用于激光束的激光元件和具有激光束的束轴和透镜的光轴的透镜 与各轴线重合，并且其中保持器彼此固定，轴线对齐。 该布置在将激光束耦合到通用传输介质方面也是有效的。 代替使用该布置，可以将透镜保持器固定到光纤保持器，然后固定到激光元件保持器，以使激光束聚焦在光纤端表面上。 当暴露于入射激光束的部分，当激光束以小的收敛角入射到块上时，或者当块变薄时，在反射涂层上期望非反射涂层。 固体材料，粘合剂和光纤通常具有大致相等的折射率。