Study Of Characteristics Based On Plate-waveguide Core Fiber

Optical fiber is a major scientific and technological invention in the 20 th century,which has been widely used in communications and sensing areas.With the rapid development of optical fiber applications,the conventional optical fiber with cylindrical core has been unable to meet the special needs of information transmission and sensing measurements.The study of specialty optical fibers is very important,and is supported with micro-nano optical waveguide theory and the preparation process.According to the question of the conventional core's thin size,it is difficult to integrate and produce micro-nano structures.To solve this question,this paper proposes a plate-waveguide core fiber with a 125 ?m diameter circular cladding.It can be compatible with the common optical fiber,and accesses to the traditional fiber-optic network.This paper is based on the detailed study of trends and specialty optical fibers within the integrated sensing demand,studying about some aspects as follow:1.Investigated plate-waveguide core fiber technology.We present plate-waveguide core fiber's structure,mode,bending loss,gradient-index flat fiber and band gap flat fiber's transmission characteristics.There are two reasons,which are the distance between two plate-waveguides and the wavelength of the incident light to affect the coupling characteristics.The result is that increasing the wavelength and distance would magnify the coupling period.2.Studied orthogonal plate-waveguide core fiber technology.We study orthogonal plate-waveguide core fiber's structure and transmission characteristics.We study fiber's polarization and dispersion characteristics based on the orthogonal structure by studying the plate waveguide's size,the material index and the incident light's wavelength how to affect the birefringence.We also study big scale orthogonal plate-waveguide core fiber's bend characteristics.We hope this fiber would be used to be a kind of polarization maintaining fibers and optical fiber sensors.3.Studied light waves regulation in the plate-waveguide core fiber with biconical taper.We introduce two fiber-optic connection methods,direct-coupling and splicing and tapering.We built a simulation model to analyze mode field distribution in the coupling process,optical power changes,and different factors which would affect its result by beam propagation method(BPM).Theoretical analysis and numerical simulation results reveal a special plate-waveguide core fiber has many advantages compared with conventional plate waveguide,increasing the flexibility of fiber optic applications.We can take advantage of large size's plate-waveguide core and stimulating many modes to integrate the various micro-nano structures.It will lay the foundation for promoting the development of sensor measurement integrated in the fiber core to be versatility,miniaturized.