中英論文翻譯對照塑料光纖傳光原理通信(完整版)
【正文】 than the transmission speed。 the refractive index of pure PMMA is , so the light in which the transmission rate of about 108m / s. Homogeneous or inhomogeneous medium light transmission medium to satisfy Fermat (Fermat) principle, that light from the space point to another along the time for extreme distance and spread, that is, the smallest of light along the optical path or the path of maximum or constant munication. principle of light transmission Fluorescent POF POF core material is mixed with a certain amount of fluorescent agent prepared from the POF, POF after such a specific wavelength of light irradiation, will send a specific wavelength of light, the principle is more plex, can be simply that the ground state molecule After bonding electron absorption of light excitation, and then return to the singlet ground state molecules that fluoresce. Refractive index distribution by fluorescence of structure POF can be divided into fluorescent SI POF and fluorescence GI POF, doped organic dye POFA most important feature is the wide range of wavelengths to provide high power output. Fluorescent POF schematic diagram of the transmission of light below, it meets the general fiber of the transmission SI optical properties, but different from the wavelength of incident light wavelength of light emitted. Fluorescent light POF there is another way of transmission, which is irradiated from the side of the incident light can be fluorescent POF, the output beam emitted from the fiber surface at both ends, of course, the wavelength of incident light is different from the transmission wavelength of light emitted. Optical properties of fluorescent material mainly depends on the matrix material, the same fluorescence characteristics of POF gain amplification pump wavelength, fluorescence POF length and the amount of dopant and concentration. Gain G is called POF output signal power Pout to the input optical power ratio between a Pin.4. Conclusion POF can be passed just because of the fiber with the core structure of the skin, the light transmission of POF is based on principle of total reflection of light transmission, light transmission in the SI POF in the zigzag way for the total reflection type of light in the GI POF in the transmission mode is the sine curve type。 fiber optic lighting, the choic
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