The Analysis And Numerical Simulation Of Waveguide Mode And Coupling Loss In Chalcogenide Materials

In recent years,with the rapid development of optical communication and optoelectronictechnology,the era of optical information is coming,and the high integration of optical devices continuously promotes the development of optical communication.However,the coupling of waveguide and optical fiber has been plagued by the development of information technology.The coupling theory of the mode has been developed for decades,and is continuously exploring.The mode analysis of waveguide and fiber is of great significance to the development of the coupling theory.The decrease of coupling loss is an important problem for the development of optical integration.In this paper,the selection of chalcogenide glass materials has been widely studied because of its lower two-photon absorption and photosensitivity.In this paper,the theoretical analysis and numerical simulation of the optical waveguide of chalcogenide glasses and the SMF-28 single mode fiber are introduced.1.First,we calculate the modes of waveguides and fibers in theory,and then determine the mode conditions for single-mode transmission of optical fibers and waveguides.2.The model of SMF-25 single mode fiber and waveguides are analyzed by using Beam PROP and Full WAVE simulator of RSOFT software.A single-mode channel waveguide with the height of 0.55?m and the width of 1.5?m and a single mode ridge waveguide with ridge height of 0.4?m,total height of 0.8?m and he width of 1.5?m are designed.Then the distribution of the single mode condition and the transmission of light in the waveguide and fiber are calculated.3.We has determined the structure of the minimum coupling loss and corresponding coupling loss which use the BPM and FDTD for numerical simulation of the propagation of light in a single mode fiber-a channel waveguide,a channel waveguide-a ridge waveguide and a ridge waveguide-a single mode fiber with the direct coupling method.