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

Patent metadata

Field	Value
Publication number	US-12111491-B2
Application number	US-202318476307-A
Country	US
Kind code	B2
Filing date	Sep 28, 2023
Priority date	Aug 23, 2021
Publication date	Oct 8, 2024
Grant date	Oct 8, 2024

Abstract

A single-core polarization-maintaining dispersion compensation micro-structured optical fiber comprises a fiber core, a first layer of air holes surrounding the fiber core, the cladding defects on the x-axis, the cladding defects on the y-axis, and the cladding. The air holes in the fiber cross section are arranged in the equilateral triangle lattice. Three consecutive air holes are omitted to form a solid area. This solid area is the fiber core. There are two cladding defects along the x-axis. Their centers are respectively located at the two vertices of the hexagon on the x-axis, which is formed by the fourth air hole ring from the core exclusive the central air hole. Each cladding defect along the x-axis contains 7 air holes and goes through from the core by only 1 layer of air holes. There are also two cladding defects along the y-axis.

First claim

We claim:

1. 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 d 1 ; 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 d 3 ; 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 d 4 ; a diameter of the air holes in the cladding is d 2 ; the above mentioned four diameters satisfy the relationship of d 1 >d 2 >d 3 >d 4 .

2. The fiber according to claim 1 , wherein the adjacent air hole spacing ∧ is in a range of 1.64-1.66 μm.

3. The fiber according to claim 1 , wherein the diameter d 1 of the air holes in the first layer surrounding the fiber core is in a range of 1.465-1.485 μm.

4. The fiber according to claim 1 , wherein the diameter d 3 of the air holes in the cladding defects on the x-axis is in a range of 0.632-0.652 μm.

5. The fiber according to claim 1 , wherein the diameter d 4 of the air holes in the cladding defects on the y-axis is in a range of 0.339-0.359 μm.

6. The fiber according to claim 1 , wherein the diameter d 2 of the air holes in the cladding is in a range of 0.914-0.934 μm.

Assignees

• Univ Yanshan

Inventors

• Wang Wei
• Kang Xiaochen
• Zhao Chang
• Yang Hongda
• Li Wenchao
• Yang Man

Classifications

• G02B6/02357

  Property of longitudinal structures or background material varies radially and/or azimuthally in the cladding, e.g. size, spacing, periodicity, shape, refractive index, graded index, quasiperiodic, quasicrystals · CPC title

• G02B6/02361

  Longitudinal structures forming multiple layers around the core, e.g. arranged in multiple rings with each ring having longitudinal elements at substantially the same radial distance from the core, having rotational symmetry about the fibre axis · CPC title

• G02B6/02352

  Complex periodic lattices or multiple interpenetrating periodic lattices, e.g. unit cell having more than two materials, partially internally coated holes, for multiple bandgaps · CPC title

• G02B6/02342

  characterised by cladding features, i.e. light confining region · CPC title

• G02B6/02285 Primary

  Characterised by the polarisation mode dispersion [PMD] properties, e.g. for minimising PMD (fabrication methods for minimising PMD C03B37/02745) · CPC title