中英論文翻譯對照塑料光纖傳光原理通信-免費(fèi)閱讀
【正文】 in the air, due to n ≈ 1, close to the propagation velocity of light propagation in vacuum Speed C。Principles of Plastic Optical Fiber CommunicationOptical Communication1. Preface Fiber itself is not light, but can return optical fiber for illumination。熒光POF就是在POF芯材中摻入一定量的熒光劑制備而成的POF，這種POF經(jīng)過特定波長的光照射后，將發(fā)出特定波長的光，其原理比較復(fù)雜，可簡單認(rèn)為基態(tài)分子中成鍵電子吸收光后激發(fā)，然后單線態(tài)分子返回到基態(tài)，即發(fā)出熒光。200280um波段為UVC，它的強(qiáng)光可以殺死地球上一切生物，包括人類, 比紫外光頻率更高的還有X光和γ射線等?；堇?William Wheeler)提出“管道照明”的設(shè)想，并獲得美國專利，這是有案可查的最早的“遙控照明”裝置，其基本原理是：用內(nèi)壁涂有反射層的管子把中心光源的光象自來水一樣引至若干個需要照明的地點, 這實際上是光纖用于照明的雛形，光纖照明系統(tǒng)簡單地就可以看作是和上述的“管道系統(tǒng)”相類似的一個系統(tǒng)，在這個系統(tǒng)中，所傳輸?shù)慕橘|(zhì)是光，而用以傳輸光的“管道”就是光纖，光纖可以把光線從光源處傳輸至需要照明的特定區(qū)域。而首次科學(xué)闡述這一現(xiàn)象的，卻是英國皇家學(xué)會的約翰1894年，麥克斯韋從理論上指出，光是一種電磁波，1905年愛因斯坦提出光是一粒一粒的粒子流，每個粒子可被稱為光子。相對而言，折射率大的傳輸介質(zhì)是光密介質(zhì)，折射率小的傳輸介質(zhì)是光疏介質(zhì)，對于POF而言，POF芯材為光密介質(zhì)，POF皮材為光疏介質(zhì)，由于光在光密媒介－芯材中的傳播速度會降低，故光在芯材中的傳輸速度慢于皮材中的傳輸速度。所謂增益G是指POF輸出信號光功率Pout與輸入光功率Pin之間的一種比值。 200280um band for the UVC, its light can kill all living things on Earth, including humans, there is a higher frequency than ultraviolet light and γ X rays。 side light and fluorescence POF POF is by total internal reflection of light transmission principle, for more than singlecore POF side light loss caused by the side of nonnatural light, and for multicore side of the light bending loss POF is produced by the luminous side. After a specific wavelength of fluorescence excitation POF issued after a specific wavelength of light, and not only exciting light incident from the end, but also from the side of the ncident. 。s and Kapany successfully with 10,000 to 20,000 of the fiber bundle to transmit images of the article, Van Heel low refractive index cladding that the role of image transmission fiber and the fiber to achieve success layer optical fiber made marked progress in these two subjects as the birth of a new, 1966, the British Standards Institute British Tele Chinese scientist Charles KCKao and Dr GAHockham detailed study of the glass in the transmission loss, the article for the optical frequency of the Dielectric fiber surface waveguides, published in the London Electrical Engineers (IEE) journal, they theoretically pointed out: If the optical fiber in the reduction or elimination of harmful impurities such as transition metal ions can greatly reduce the transmission loss and improve the optical
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