A Optical Design And Analysis For Large Data Transmission

With the development of Internet, large amounts of data are produced and enter the information system by the minute, waiting for the analysis and utilization. These data are called as big data. Big data have many advantages: magnanimity,diversification, high flow speed, etc.. To analyze and solve various problems, these advantages will bring us new ideas and methods. To transmit data, the design of optical fibers are very necessary it begin to attract attention of the domestic and foreign research institutions. the traditional optical fibers based on total internal reflection are composed of solid core and cladding, their structure and confine mechanism determines the loss caused by the absorption and scattering, the nonlinear effect of fiber core made in solid medium limits the maximum power and transmission channel spacing of optical signal, and the dispersion constraints the ascension of transmission bit rate of signal. In this thesis, four kinds of photonic crystal fiber are designed respectively including solid photonic band gap fiber, hollow photonic band gap fiber, solid Bragg fiber, hollow Bragg fiber. The photonic band gap and transmission bandwidth as well as group velocity dispersion of these four kinds of fiber are analyzed. The results show that a kind of hollow Bragg fiber is promise for its broad band gap and thus large transmission bandwidth. The results of this thesis is of great significance in research and development of long distance transmission fiber for big data.