نتایج جستجو برای: Birefringent medium

تعداد نتایج: 238135  

Farzad Vaziri Alamdarlo Masoud Rezvani Jalal

In the present paper, the problem of light reflection from a birefringent medium and thin film is considered. First, the analytical equations governing the propagation of a plane and harmonic electromagnetic wave in an infinite, birefringent, linear, non-dispersive, non-absorbing, and non-magnetic medium is derived from Maxwell equations. Then, using phase matching condition and boundary condit...

Journal: :Journal of biomedical optics 2014
Yihong Guo Celong Liu Nan Zeng Honghui He E Du Yonghong He Hui Ma

We report an anisotropic tissue model containing well-ordered birefringent cylinders. Using simulations and experiments, we examined the different polarization features for nonbirefringent and birefringent cylinders and analyzed the influence of the birefringent cylinders on the retardance obtained from Mueller matrix polar decomposition. For the well-ordered birefringent cylinders, retardance ...

Journal: :Optics letters 2005
Ian Hodgkinson Qi Hong Wu Lakshman De Silva Matthew Arnold Akhlesh Lakhtakia Martin McCall

The structure of an inorganic chiral medium represented as a stack of identical form-birefringent layers that twist steadily with increasing thickness is perturbed by realigning a fraction of each layer to a fixed direction. Experimental results show that the resulting chiral-birefringent composite medium exhibits Bragg resonance with elliptically polarized light, and simulations indicate that ...

Journal: :Journal of cell science 1972
K Jobst N Kellermayer

In HeLa cells cultured in a medium containing 142 mequiv./l. sodium ions only the mitotic forms are birefringent (anisotropic index, 27/1000). In a culture medium containing 155-160 mequiv./l. sodium ions, large numbers of nuclear forms reminiscent of the prophase were found. In such a medium the anisotropic index was 86/1000. At low sodium ion concentration (90-110 mequiv./l.) these anomalous,...

2007
Muddassir Iqbal Tian Yu

Pulse propagation in a birefringent medium carries due weightage and importance in passive modelocking of fiber lasers. We have carried out study of nonlinear effects in birefringent medium by simulating pulse propagation using adaptive step size method, which is globally an efficient algorithm for solving Schrodinger type equations using split step Fourier method. Nonlinear optical loop mirror...

2010
N. Kalyanasundaram P. Muthuchidambaranathan

A systematic derivation of the Coupled Nonlinear Schrodinger Equations (CNLSE) governing nonlinear pulse propagation in a weakly birefringent monomode optical fiber based on a multiple-scale perturbation solution of the semilinear vector wave equation for the electric field in a (randomly) birefringent fiber medium is presented. The analysis of the nonlinear propagation characteristics of optic...

Journal: :Optics letters 1986
H G Winful

A medium with linear birefringence will preserve the polarization state of a light beam whose electric-field vector is oriented along either principal axis of the medium. In that regard, the two principal axes are entirely equivalent. It is usually assumed that this equivalence also holds at high intensities and that an intense beam oriented along either axis will suffer no changes in its polar...

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