US 12,449,592 B2
Polarization-maintaining dispersion-compensation microstructure fiber
Wei Wang, Qinhuangdao (CN); Man Yang, Qinhuangdao (CN); Chang Zhao, Qinhuangdao (CN); Xiaochen Kang, Qinhuangdao (CN); Hongda Yang, Qinhuangdao (CN); and Wenchao Li, Qinhuangdao (CN)
Assigned to YANSHAN UNIVERSITY, Qinhuangdao (CN)
Filed by YANSHAN UNIVERSITY, Qinhuangdao (CN)
Filed on Feb. 21, 2023, as Appl. No. 18/172,256.
Application 18/172,256 is a continuation of application No. PCT/CN2022/092253, filed on May 11, 2022.
Claims priority of application No. 202110769340.0 (CN), filed on Jul. 7, 2021.
Prior Publication US 2023/0204855 A1, Jun. 29, 2023
Int. Cl. G02B 6/02 (2006.01); G02B 6/024 (2006.01); G02B 6/036 (2006.01)
CPC G02B 6/024 (2013.01) [G02B 6/02042 (2013.01); G02B 6/02261 (2013.01); G02B 6/02285 (2013.01); G02B 6/02319 (2013.01); G02B 6/02342 (2013.01); G02B 6/02357 (2013.01); G02B 6/02366 (2013.01); G02B 6/036 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A polarization-maintaining dispersion-compensation microstructure fiber, wherein pure silica glass is used as a base material; the fiber comprises an inner core, a single-layer air-hole array surrounding the inner core, an inner cladding air-hole array, an air-hole array in an outer core, a single-layer air-hole array surrounding the outer core, and an outer cladding air-hole array; the single-layer air-hole array surrounding the inner core and the inner cladding air-hole array are collectively referred to an air-hole array in a first area; the air-hole array in the outer core, the single-layer air-hole array surrounding the outer core, and the air-hole array in the outer core are collectively referred to an air-hole array in a second area;
the air-hole array in the first area includes 3 rows of air holes arranged in a square lattice arrangement with an adjacent air hole spacing Λ; in the first area, two air holes in a middle row are omitted to form the inner core; a midpoint of a line connecting centers of the two omitted air holes are defined as a coordinate original point; an axis connecting the centers of the two omitted air holes is defined as y-axis; an axis passing through the original point and perpendicular to the y-axis is defined as the x-axis; a diameter of the air holes in the single-layer air-hole array surrounding the inner core is d1; the air holes in the air-hole array in the second area are arranged in square lattice arrangement with the adjacent air hole spacing Λ; the second area contains two sub-areas that are located outside the first area in the x-direction; the air-hole arrays in the first and second areas are separated by Λ along x-direction, and dislocated by Λ/2 along y-direction; two outer cores are respectively located in the two sub-areas of the second area and are symmetrically distributed with respect to the y-axis; the two outer cores have an identical structure; each of the two outer cores contains the air-hole array in the outer core and each air-hole array in the outer core comprises two air holes with a diameter d3; four air holes with the diameter d3 are located on a positive x-axis and a negative x-axis respectively, with distances of 3Λ and 4Λ measured from the centers of the air holes to the original point, respectively; a diameter of the air holes in the single-layer air-hole array surrounding the outer core is d2; a diameter of the air holes in the inner cladding air-hole array and the outer cladding air-hole array are both d4; the four diameters satisfy the relationship of d1>d2>d4>d3.