公开(公告)号：US20020181512A1

公开(公告)日：2002-12-05

申请号：US10147023

申请日：2002-05-15

Applicant: Apollo Instruments, Inc.

Inventor： Zhijiang Wang ,  Ying Wang

IPC: H01S003/30

CPC classification number: H01S3/06716 ,  G02B6/4204 ,  H01S3/06708 ,  H01S3/094007 ,  H01S3/302

Abstract: A double cladding fiber includes an inner core doped with active species, an inner cladding disposed adjacent said inner core for receiving pumping energy, minimizing local modes in said inner cladding, and transferring said pumping energy to the core. An outer cladding is disposed adjacent the inner cladding. The cross section of said inner cladding has a polygon-like shape with its boundary being a plurality of well-defined arcs, each of the arcs having substantially different arc center for delivering energy with maximum efficiency to the inner core meeting the limitation of: (1nullL/r1)(1nullL/r2) 1; where r1 and r2 is the arc radius of the inner cladding surfaces that are opposite to each other (mirror pair), with the radius of a concave mirror being positive and that of a convex mirror being negative, L is the distance between two mirrors.

Abstract translation: 双包层光纤包括掺杂有活性物质的内核，邻近所述内核设置的用于接收泵送能量的内包层，使所述内包层中的局部模式最小化，并将所述泵送能量转移到核心。 外包层邻近内包层设置。 所述内包层的横截面具有多边形形状，其边界是多个明确限定的弧，每个弧具有基本上不同的圆弧中心，用于以最大的效率向内芯输送满足以下限制的能量： 段落lvl =“0”> （1-L / r1）（1-L / r2）<0， < line-formula>或 <段落lvl =“0”> （1-L / r1）（1-L / r2）> 1; 其中r1和r2是彼此相反（反射镜对）的内包层表面的圆弧半径，凹面镜的半径为正，而凸面镜的半径为负， L是两个镜子之间的距离。