High double-refraction photonic crystal fiber (PCF)

Abstract

The invention discloses a high double-refraction photonic crystal fiber (PCF) comprising a fiber core and a cladding. Two small air holes are removed from the central part of an optical fiber so that an ellipse-like fiber core is formed; meanwhile, the structural arrangement of the air holes of the cladding is changed, and four pairs of large air holes and a pair of elliptic air holes are introduced to the cladding and connected to the fiber core, so that the optical fiber with the structure has double rotation symmetry, a cross-polarization mode is not degenerated again, and very high double-refraction is shown. Through changing the structure of the fiber core and adjusting the diameters of the large air holes and the ellipticities of the elliptic air holes within a certain range, the PCF is two orders of magnitudes higher than a common optical fiber due to the adoption of the mode of double refraction, and meanwhile, the optical fiber has a high nonlinear coefficient. The PCF provided by the invention has the advantages of simple structure, high double-refraction and high nonlinearity. The PCF with the structure can be used for manufacturing a polarization-preserving optical fiber and relevant optical fiber devices with proper nonlinearity or polarization characteristics.

Description

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AI Technical Summary

Benefits of technology

Inventors have developed new types of structures called photonicscores (PCs) which offer unique properties such as being highly bireflective without losing their ability to rotate light waves effectively. These PCs allow for creation of specialized materials like polarizers that maintain linearly dispersed electromagnetic radiation over long distances. They also provide stable performance even when exposed to different temperatures during use.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the quality of opaque telecommunications equipment without sacrificing its functionality. Specifically, there needs to reduce distortion caused when signals travel through them because these components cannot function properly at all times. To solve this problem, various techniques like adding extra layers on top of existing materials inside the device' s inner layer were developed but only limited successes could still result from improved designs.

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