The Research Of The Transport Properties Of Random Electromagnetic Gaussian-Schell Mode Beams In Biological Tissues

In recent years,the transmission and distribution in biological tissues of laser become a hot research,and the interaction between laser and biological tissue to form the new discipline photonics and life sciences-Biomedical Photonics.This paper is vector analyzed by coherent polarization theory and generalized Huygens-Fresnel principle,and the cross spectral density matrix elements transfer equations of beam transmitted into biological tissue are deduced by Gaussian-Schell model(GSM).Therefore,the transmission characteristics(Spectral intensity?The degree of spectral polarization?The ellipticity of spectrum?The azimuth angle of spectrum ? Spectral degree of coherence)of random electromagnetic GSM beam are analyzed and studied.The full text is divided into five chapters,the following are the content:Chapter 1: The application background and situation of laser in the field of biomedicine are introduced,the researchers of random electromagnetic GSM research beams,and the basic theory and methods used to,basic transmission beam equation,the extended Huygens-Fresnel principle,coherent polarization theory,power spectrum model of biological tissue.Chapter 2: The cross spectral density matrix elements transfer equations of random electromagnetic GSM beam transmitted into biological tissue are deduced by analytic methods,then the spectral intensity of random electromagnetic GSM is obtained.The Spectral intensity transport properties on the axis and horizontal of random electromagnetic GSM beam transmitted into biological tissue are analyzed by numerical calculation.Chapter 3: The polarization variation of random electromagnetic GSM beam transmitted into biological tissue is studied.The changement of polarization,ellipticity,orientation angle on the axis and the horizontal are analyzed in details when the random electromagnetic GSM transmitted in biological tissues.and the beam parameters and the transmission distancewhich have an effect on the beam polarization in human skin tissue transfer.Chapter 4: The spectral degree of coherence of random electromagnetic GSM is obtained by cross spectral density matrix elements transfer equations of random electromagnetic GSM beam transmitted into biological tissue.Spectral degree of coherence transport properties on the axis and horizontal of random electromagnetic GSM beam transmitted into biological tissue are analyzed by numerical calculation.Chapter 5: The thesis is summarized at the final chapter,and some proposals are given for future work.