A Novel High Birefringence Photonic Quasicrystalline Fiber

Abstract

The invention discloses a novel high-birefringence photonic quasicrystal fiber, a background material is SiO2, scatters of the entire structure are arranged in a tenfold Penrose type photonic quasicrystal structure, the lattice constant is lambda, and diameters of round air holes of a wrapping layer are d3 and d4, wherein d3 derives from the scatters of the third layer to the fifth layer of the tenfold Penrose type photonic quasicrystal structure, and d4 derives from the scatters of the sixth layer to the ninth layer of the tenfold Penrose type photonic quasicrystal structure; and six roundly air holes are introduced into a core region, diameters of four round air holes at upper and lower sides are d1 and derive from four scatters of the second layer of the tenfold Penrose type photonic quasicrystal structure which are close to + / - Y axis, and diameters of two round air holes at left and right sides are d2 and derive from two scatters of the third layer of the tenfold Penrose type photonic quasicrystal structure on + / - X axis; and to enhance asymmetry so as to improve birefringence, two round air holes whose diameters are d5 are introduced to positions of 1.3*lambda on the + / -Y axis. The novel high-birefringence photonic quasicrystal fiber provided by the invention has the advantages that mode field energy distribution is concentrated and limitation of an existing technological level to fiber preparation is reduced.

Description

technical field [0001] The invention relates to a high birefringence photonic quasicrystal fiber with small radius, in particular to a SiO-based 2 Highly birefringent photonic quasicrystal fibers. Background technique [0002] In applications such as optical fiber sensing, optical communication, and optical precision instruments, high birefringent optical fibers have great application requirements, such as optical fiber communication, photonic crystal fiber lasers, photonic crystal fiber sensors, etc. The high birefringence increases the ability to maintain polarization, i.e. keep the polarization of light in the supercontinuum range. [0003] In order to achieve high birefringence, most photonic crystal fiber structures basically introduce circular holes, elliptical holes, helical structures with too small diameters or fill other liquids in the air holes to make it more difficult to manufacture. [0004] In practical sensing applications, not only the optical fiber is req...

AI Technical Summary

Problems solved by technology

However, most of the high-birefringence photonic crystal fibers currently proposed have a radius greater than 10 nm and a relatively dispersed field distribution.

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