| Summary: | 碩士 === 國立臺灣科技大學 === 光電工程研究所 === 96 === This thesis focuses on the wavelength division multiplex (WDM) passive optical network (PON) architecture designs applied in intelligent building. This thesis is divided into two parts; the first part is to design a novel WDM PON architecture that can be employed in intelligent building. To match the outside shape of traditional buildings, we report and demonstrate a simple network architecture that is consists of double central offices (COs) and backbones. All the optical passive components we used are only simple optical passive components such as switches, power couplers, and WDM multiplexers. In contrast to a classical WDM PON, the proposed architecture has a complete in-line protection switching ability including backbones of whole network and distributed line lines for single floors. A high service survival rate is observed.
The proposed architecture can approach 10Gb/s data rate with power margin over 5dB. It also can provide the network immunity to each unexpected calamities and provide various backup methods for outside communication. The users will not face the threat to compromise of private information and the network administrator can proved a user reconfigurable service.
The three-tier hierarchical service levels may combine with various access technologies including the time division multiplex (TDM) technology and can enlarge the user capacity. The maximum user capacity is [(The user amount of first level) + (laser channels - The user amount of first level) × (The percentage to the user amount of second level) × (The maximum user capacity of TDM system) + (The user amount of the third level)].
The second part discusses the hybrid erbium doped fiber amplifier (EDFA)/Raman fiber amplifier (RFA) we can employ in an access network. With low concentration EDF, the gain can be flattened basically. The maximum gain difference is about 5.5dB only. By sharing the residual pumping power, the noise figure (NF) will also be reduced. The gain improvements are 1dB to EDFA and RFA. The NF improvements are 1dB to EDFA and 0.4dB to RFA. We also introduced a distributed dispersion compensation mechanism. When a common 4041-m dispersion compensation fiber had been set up, only the difference in length between 4041m and other individual DCF lengths for different wavelengths should be set up additionally.
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