| Access network is connected to users and transports voice, data and video to end-users. It is playing an important role in communication networks. Passive optical network (PON) has becomes an important access method because it possesses broadband transporting capability, is easy to maintenance, reduces access cost by sharing transporting medium and can transform to FTTH smoothly.PON can be divided into Time Division Multiplexing PON and Wavelength Division Multiplexing PON (WDM-PON). WDM-PON is much superiority on bandwidth, power budget, secrecy and the number of users except cost. With the appearance of VoIP, IPTV, HDTV, Meeting TV and VOD multimedia services, users'demands with higher bandwidth are further increased. With the development of WDM technology, the cost of equipments is reducing. It is the inevitable trend that the high capacity WDM technology will be used into access network.WDM-PON can be categorized as optical loop back WDM-PON, spectrum-sliced WDM-PON and Re-modulation WDM-PON according to its realized method. Currently, re-modulation WDM-PON has been widely studied for its advantages. This paper mainly gives a further and comprehensive research about the characteristics of reflects WDM-PON, including the RSOA technology, the reflection noise, and a new novel of a FSK/OOK RSOA-WDM-PON. We wish it should be importance to the development and research on high capacity PON. Combining theory study and simulation, the writer has done the following work: 1. Studied the internal and abroad development instances of optical access network in detail, and deeply studied the international trends of passive optical network (especially the high capacity PON). Analyzed the advantage of WDM-PON.2.For the re-modulated WDM-PON, analysis the re-modulation devices RSOA working principle and characteristics theoretically. Do a In-depth research on RSOA-WDM-PON system performance.3.Via simulation, compare the different impact of reflection noise in the re-modulation RSOA-based WDM-PON in different transmission distances.4. Proposed a FSK/OOK transmission mode for the re-modulated WDM-PON system, given the optimum system architecture, focused on OLT-side pre-filter options of this structure, and analysis its performance at last.This article is summary of the writer's theory study and practical research during being a graduate student, including follow parts:The 1st part introduces knowledge background and the writer's research content and achievements.The 2nd part based on PON, introduces the study of WDM technology and its system architecture, further researches a kind of hybrid PON and summarizes its high capacity advantages.The 3rd part analyzes the re-modulation WDM-PON system, including theory and characteristics.The 4th part studies the reflection noise of WDM-PON and its impact in different transmission distances.The 5th part Proposed a FSK/OOK transmission mode for the re-modulated WDM-PON system, given the optimum system architecture, focused on OLT-side pre-filter options of this structure, and analysis its performance at last.In the end, the writer summarized the existing work and gives an expectation for the next step. |
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