Tapered mode field gradient optical fiber

The embodiment of the utility model relates to the technical field of optical fibers, and discloses a tapered mode field gradient optical fiber, which is used for connecting different types of optical fibers and comprises a small-equal-diameter small-mode-field region, a tapered mode field gradient region and a large-equal-diameter large-mode-field region along the length direction, wherein the small-equal-diameter small-mode-field region and the large-equal-diameter large-mode-field region are used for butting optical fibers or testing. Through the above structure, the embodiment of the utility model can effectively reduce the loss during the butt joint of optical fibers, and has high connectivity. 本实用新型实施例涉及光纤技术领域，公开了一种锥形模场渐变光纤，所述锥形模场渐变光纤用于不同型号光纤之间的连接，所述锥形模场渐变光纤沿长度方向包括小等径小模场区、锥形模场渐变区及大等径大模场区；其中，所述小等径小模场区及所述大等径大模场区用于对接光纤或测试。通过上述结构，本实用新型实施例能够有效降低光纤对接时的损耗，并且具有较高的连通性。