Hollow negative curvature photonic crystal fiber with high birefringence and low loss

Abstract

A hollow negative curvature photonic crystal fiber with high birefringence and low loss comprises an optical fiber tube body which has a circular cross section and is hollow inside. The tube wall of the optical fiber tube body comprises inner and outer layers of circular ring structures. Two large capillary tubes internally tangent to an optical fiber interlayer are arranged in the hollow core ofthe optical fiber tube body in a bilateral symmetry manner. Three small capillary tubes which are internally tangent to the optical fiber interlayer and are the same are arranged in the hollow core ofthe optical fiber tube body above and below the space between the two large capillary tubes. A medium capillary tube internally tangent to the corresponding large capillary tube is arranged in each of the two large capillary tubes. The small capillary tubes, the medium capillary tubes and the large capillary tubes are bilaterally symmetrical. A light wave transmission cavity defined by the smallcapillary tubes and the large capillary tubes is formed in the center of the hollow core of the optical fiber tube body. The optical fiber tube body, the large capillary tubes, the medium capillary tubes and the small capillary tubes are all made of silica glass. The optical fiber is simple in structural design, the adjustable range of capillary structure parameters is large, and industrial preparation and commercial application of HCF can be achieved.

Description

technical field [0001] The invention relates to a hollow-core negative-curvature photonic crystal fiber with high birefringence and low loss. Background technique [0002] Since the beginning of the 20th century, the emergence and wide application of optical fiber technology has established revolutionary achievements in the three major fields of optical fiber communication, optical fiber lasers, and optical fiber sensing. Optical fiber technology is an important cornerstone of today's industrial civilization. However, with the explosive growth of information transmission capacity and people's extremely high demand for information transmission speed, the inherent defects (non-linearity, dispersion, photo-induced damage, ultraviolet, mid-infrared, etc.) of the original optical fiber are exposed more and more. It is more and more obvious that it seriously restricts the continuous development of the above-mentioned industrial fields. The emergence of photonic crystal fiber has ...

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Problems solved by technology

However, the optical properties of HCF in the mid-infrared band, especially the birefringence and loss-limited properties, have not been studied so far.

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