Optical Properties Of Tellurite Glass And Its Super-continuous Microstructure Fiber

The supercontinuum(SC)has the characteristics of simple and cheap,simple structure and stable and reliable.Especially,the SC in the middle infrared band also has the advantages of broad spectrum,good spatial coherence and high brightness.In medical diagnosis and treatment,optical measurement,Spectroscopy and many other fields have a wide range of applications.This makes the high-power,wide-band infrared SC output as many researchers to pursue the goal,but also the current academic research hot spots.In this paper,the tellurite glass was designed and prepared.In the laboratory,the supercontinuum experiments of tellurite glass were carried out.Three kinds of samples with good optical properties were prepared in the existing materials.Among them,the Te-Zn-Na-F component of the tellurite glass block,which is relatively continuous in the experiment,produces a relatively wide,through the data analysis,for the next step of the tellurite glass block and fiber supercontinuum experiment Basis and basis.Secondly,the single-mode fiber is designed with the tellurite glass as the material.In order to adapt to the central wavelength of the laboratory pump light source,the single-mode fiber is adjusted and the zero-dispersion wavelength is changed.The super-continuous spectrum simulation of the single-mode fiber,By adjusting the parameters and found that single-mode fiber zero dispersion wavelength adjustment is not flexible enough,the effect is not obvious.Finally,a new type of solid Bragg fiber structure is proposed.The dispersion curve of solid Bragg fiber is analyzed by finite element difference method in COMSOL Multiphysics software.The different optical fiber parameters(period,duty cycle and cladding refractive index)The influence of the dispersion curve.By studying and changing the data of the three parameters,we can obtain the solid Prague fiber with relative optimization,and successfully control its zero-dispersion wavelength in the vicinity of 1.064?m,which provides the basis for the selection of the pump source in the supercontinuum experiment.Also broadened the range of supercontinuum experiments.In addition,this paper uses the stepwise Fourier method to study the transmission of optical pulses in the fiber.By solving the nonlinear Schr(o)dinger equation,the simulation results of the supercontinuum in the fiber can be obtained.Under the condition of determining the optical fiber parameters,The influence of the parameter variation of Puyuan on the simulation results provides the data comparison for the supercontinuum generation experiment of the next fiber.