Study On The Fundamental Properties Of Non-Quartz And Mid-Infrared With High Birefringence Photonic Crystal Fiber

Along with the studies of quartz-PCFs become mature and perfect increasingly, people began to change the materials which be used to fabricate fibers from silica-material turned to non-quartz materials, such as Chalcogenide glasses, silicate glasses, oxide glasses and various soft glasses etc. The uses of non-quartz materials photonic crystal fibers have largely expanded the pervious ranges of light which from the visible and near-infrared wave band to the mid- infrared and far-infrared band or ultraviolet. We can get lots of novel fiber optic components through applicating the different materials photonic crystal fibers such as optical fiber amplifiers, fiber lasers, and fiber sensors etc. Thesis mainly designs several typical non-quartz materials with different structures photonic crystal fibers and researches on its basic characteristicsTo begin with, a kind of traditional structure photonic crystal fibers of hexagonal arrangement is designed with one kind of GLS glasses, and numerical simulate its basic characteristics using the electromagnetic scattering theory of multi-pole method. And it finds that it possess high birefringence and high nonlinear properties in infrared bands, which provides a theory basis for manufacturing fiber optic components suitable for this band.Secondly, we design a kind of novel structure with divided one air hole into two and as part of a group which break traditional hexagonal array, many groups of air holes and background material tellurium glass constitute the fiber structure. Through numerical simulation, and found that the photonic crystal fibers with excellent high birefringence, high nonlinearity, adjustable waveguide dispersion etc characteristics.Finally, design the photonic crystal fibers with circular packet layer and different fiber cores structure of As₂Se₃ material, the study found that the photonic crystal fibers with rectangular core have higher birefringence and nonlinear than which have hexagon core and the oval core, and in addition to find the influence degree which material dispersion affect to waveguide dispersion is different in different waveband.The studies of this paper provide ideas for design and research of new structure photonic crystal fibers and production photonic devices which suits for this band.