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1、Physics of Light: A Brief Overview,Fiber Optic Communication Technology lecture 2,基本内容： 光的电磁波；射线理论和光子(Electromagnetic Waves; Beams(Rays); A Stream of the Photons) 重点、难点： 掌握光的基本特性。了解光波的电磁波谱分布(electromagnetic)。重点掌握光的折射和反射定律(refracted beams and reflection beams)，了解能级之间的泵浦和辐射。(pumping and radiate),Conte
2、nts,Electromagnetic waves Beams (Rays) A Stream of Photons,Wave optics,Experimental basis: Interference experiments of Young, diffraction and interference experiments of Fresnel Theoretical basis: Maxwells equations Important wave phenomena in optics: Polarization (偏振) Interference(干涉) Diffraction(衍
3、射),MAXWELLS EQUATIONS B = 0 D = E = B/t H = J +D/t From the first line, the normal components of D and B are continuous across a dielectric interface From the second line, the tangential components of E and H are continuous across a dielectric interface,Fig. 2-2: Field distributions in plane E 3/2,
4、:,-axis of ellipse relative to x:,+ : right circularly polarized,The index of refraction of a medium is the ratio of the velocity of light in vacuum (c) to the phase velocity in the medium (v): n =c/v,Beams(Rays),Incident, reflected and refracted beams,photonsPump(甭浦) and radiation(辐射),for emission, absorption Indicates optical radiation has particle as well as wave properties,The quantum nature of light & basic laws,the quantum nature:,
