Low loss antiradiation dual refracting photonic crystal fiber

Abstract

The invention discloses a low loss antiradiation dual refracting photonic crystal fiber, which relates to the field of a photonic crystal fiber and comprises a center fiber core; an air pore layer, a quartz cladding layer and a coating layer are arranged at the outer part of the center fiber core in sequence from inside to outside; the center fiber core comprises a pure silicon fiber core and a deep doped fluorine concave inner cladding layer coating the outside of the pure silicon fiber core; the air pore layer comprises four layers of rings consisted of air pores from inside to outside, the first layer of ring consists of two large air pores and multiple small air pores; each of the second layer of ring, the third layer of ring and the fourth layer of ring consists of multiple small air pores; the air pores of the four layers of rings are all arrayed in a regular hexagonal manner. All air pores are connected by a quartz connecting wall. While realizing dual refracting, the photonic crystal fiber has very low loss and antiradiation performance, and can meet the use demands of special environment application occasions such as aerospace.

Description

technical field [0001] The invention relates to the field of photonic crystal fibers, in particular to a low-loss anti-irradiation birefringence photonic crystal fiber. Background technique [0002] High birefringent optical fibers are widely used in communication, sensing and other fields. Optical fiber sensing technology with polarization maintaining optical fiber as the core component, especially fiber optic gyroscope technology and fiber optic hydrophone technology have received more attention. Polarization-maintaining fiber has excellent birefringence effect, which increases the difference in propagation constants of the two orthogonal constituent modes HEx11 and HEy11 of the fundamental mode transmitted inside it, and reduces the coupling probability of these two orthogonal modes, thus in It maintains its polarization state well when transmitting linearly polarized light. With the in-depth development from amplitude modulation to phase or polarization state modulatio...

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Problems solved by technology

[0005] However, the existing photonic crystal fiber is still limited to a simple replacement of the performance of the conventional polarization-maintaining fiber, that is, a good birefringence effect can be achieved through the arrangement of air holes to replace the birefringence effect of the conventional polarization-maintaining fiber

For the reduction of fiber loss and the improvement of radiation resistance performance, there are still certain restrictions, so that the existing photonic crystal fiber cannot meet the use requirements of special environmental applications such as aerospace and aviation. Therefore, it has not been available for a long time. Practical research results of birefringent photonic crystal fibers suitable for the development of higher-precision fiber optic gyroscopes

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