The Research Of The Transport Properties Of The Random Electromagnetic Gaussian Schell Mode Vortex Beams(GSM) In Biological Tissues

We need to fully understand the temporal and spatial distribution of light within the tissues in order to study and explore deeply the medical imaging and the physiological state of organization structure,Secondly,the turbulent movement of matter is everywhere in human life,if we can make the best of the effects,we will can modify and utilize nature correctly.Therefore,the problem of the laser beams propagating in turbulent biological tissues has become the focus of scholars.Chapter 1:we introduce the research background and the status of the application of laser in the field of biomedicine as well as the present research situation of the random electromagnetic GSM vortex beams,Simultaneously,based on the theoretical basis and research methods,we describe the significance of the research and the theoretical and research methods of transmitting in turbulent mediums.Chapter 2:The variation of the degree of polarization P with transmission distance z is studied for the structure constant of the refractive-indexC_n²,the spatial cross-correlation length?_xy,the spatial self-correlation length?_yyy and the wavelength?.The results show that the order of the complexity of the degree of polarization P is P?0,?,z??P??,?,z?and P?0,0,z?.The degree of polarization at source plane has nothing to do with the wave length,and has connection with the spatial correlation length.Chapter 3:The changes of the polarization state of the random electromagnetic GSM vortex beams passing through the turbulent biological tissues are analyzed.The results show that the smaller the wavelength?is,the larger the structure constant of the refractive-indeC_n² is,the greater the minimum value is and the smaller the maximum value is of the degree of polarization P??,0,z?.the greater the spatial cross-correlation length?_xyis,the smaller the minimum value is and the larger the maximum value is of the degree of polarization P??,0,z?.the polarity of the initial and final values of the azimuth angle?are opposite,the variation trend of the azimuth angle is also different When the polarity of the difference between?_yyy and?_xxx is different.If the spatial correlation length is?_yy=?_xx,there is the maximum value of the ellipticity?.Chapter 4:The variation of the degree of spectral coherence of the random electromagnetic GSM vortex beams passing through the turbulent biological tissue is studied.The variation is related to the structure constant of refractive-indexC_n² and the wavelength?.The larger the structure constant of refractive-indexC_n² is,the smaller the maximum value of the degree of coherence and the corresponding propagation distance are,the greater the wavelength?is,the greaterthe degree of spectral coherence is.Chapter 5:The variation of the stokes parameters is studied by using the generalized stokes expression.The research shows that the structure constant of refractive-indexC_n² is larger,the smaller the maximum value of the stokes parameterss'₀,'₂s,'₃s are,the greater the minimum value of the stokes parameter₁s'are,At the same time,the wavelength of the far-infrared is close to the spontaneous wavelength of the biological tissues,and there is a strong absorption of the ultraviolet in the biological tissues.so we choose the near-infrared light to study.Chapter 6:The research work is summarized about the random electromagnetic GSM vortex beams passing through the biological tissues.