Single-core polarization-maintaining dispersion compensation micro-structured optical fiber

A single core polarization maintaining dispersion compensation microstructure fiber, wherein the fiber comprises a pure silica glass used as a background material, a fiber core, a first layer of air holes surrounding the fiber core, cladding defects on an x-axis, cladding defects on a y-axis, and a cladding;

• air holes in the fiber cross section are arranged in an equilateral triangle lattice, with an adjacent air holes spacing ∧;
• three consecutive air holes are omitted along one of the edges of a hexagon to form a solid area;
• the solid area is the fiber core;
• a center of one of the three omitted air holes which is located in a middle of the three omitted air holes is defined as a coordinate original point;
• an axis connecting centers of the three omitted air holes is defined as the x-axis;
• an axis passing through the original point and perpendicular to the x-axis is defined as the y-axis;
• the first layer of air holes surrounding the fiber core contains 10 air holes with a diameter of d1;
• there are two cladding defects along the x-axis with identical structure and symmetrically distributed with respect to the y-axis;
• centers of the two cladding defects along the x-axis are respectively located at two vertices of a hexagonal air-hole ring on the x-axis;
• each cladding defect along the x-axis contains 1 air hole centered on the x-axis and 6 air holes surrounding the 1 air hole, and the centers of the cladding defect along the x-axis is spaced from the fiber core by only 1 layer of air holes;
• the diameter of the 1 air hole centered on the x-axis and 6 air holes surrounding the 1 air hole is d3;
• there are 2 cladding defects along the y-axis with identical structure and symmetrically distributed with respect to the x-axis;
• centers of the 2 cladding defects along the y-axis are respectively located on the y-axis and also located on the perpendicular bisector of the top and bottom edges of the hexagon;
• the centers of the cladding defects along the y-axis are spaced from the fiber core by 3 layers of air holes;
• each of the cladding defects along the y-axis contains 1 air hole with a diameter of d4;
• a diameter of the air holes in the cladding is d2;
• the above mentioned four diameters satisfy the relationship of d1>d2>d3>d4.