使用色散補償拉曼/摻鉺光纖混合式放大器應用於長距離高密度分波多工/分時多工被動式光網路之研究與設計

本篇論文中，提出了使用上、下行分離路徑且具有10 Gb/s對稱性傳輸速率：的長距離被動式光網路(Passive Optical Network；PON)系統，系統中上、下行分別各為32個高密度分波多工間距為0.4 nm(50 GHz)之通道，其中使用以色散補償光纖為主的拉曼放大器來搭配摻鉺光纖放大器(Erbium-Doped Fiber Amplifier；EDFA)來補償光纖總長約110 km和元件造成的損失。考慮到傳輸途中不使用到供電元件，因此在下行方向我們將拉曼放大器的泵激雷射和EDFA分別放置於本地交換(Local Exchange；LE)處，而在上行方向我們將拉曼放大器的泵激雷射和摻鉺光纖放大器分別放置於核心交換(Core Exchange；CE)處。本篇論文驗證了使用混合式拉曼/摻鉺光纖放大器來補償因路徑增長和高分流比所造成的色散和損失，使得總傳輸距離能夠延伸至110 km、傳輸速率為對稱性10 Gb/s且系統使用上、下行各32個通道，分別皆是256個分流比(splitting ratio)總共能夠支援32個分時多工，亦即能服務8192個光網路單元(Optical Network Unit；ONU)，每個使用者在低流量載入時可使用的速率達39 Mb/s的長距離光接取網路得以實行。

關鍵字

被動式光網路；高密度分波多工；拉曼放大器；摻鉺光纖放大器

並列摘要

In this thesis, a long-reach passive optical network (PON), with 10Gb/s symmetrical bit rates, is proposed in an upstream and downstream separate way. There are 32 upstream and downstream channels individually with a 0.4 nm DWDM channel spacing. The dispersion-compensating, as one function of Raman/ EDFA hybrid amplifier, is used in the proposed structure based on DCF. Raman/EDFA hybrid amplifier is also to increase the power of the attenuated optical signal caused by a total reach of 110km SMF and the splitters. Considering the component without electrical power to maintain passive characteristics of the PON in the transmission, we placed the pump laser of Raman amplifier and EDFA at LE(Local Exchange) for downstream and at CE(Core Exchange) for upstream individually. In this thesis, the hybrid Raman/EDFA amplifier is verified to compensate the dispersion and loss caused by the increasing fiber length and high split ratio. The results showed that the total reach extension of DWDM/TDM PON achieved 110km, symmetrical bit rates of 32-DWDM channels reached 10Gb/s, and 32-TDM PONs could support 8192 customers in total. Therefore, the network could support mean bit rates of 39 Mb/s under conditions of low traffic loading.

並列關鍵字

Passive optical network (PON) ； dense wavelength-division multiplexing (DWDM) ； Raman amplifier ； erbium-doped fiber amplifier (EDFA)

參考文獻

[3] D. Nesset et al., “10 Gbit/s Bidirectional Transmission in 1024-way Split, 110 km Reach, PON System using Commercial Transceiver Modules, Super FEC and EDC,” in ECOC, 2005, pp. Tu 1.3.1.

[5] J. H. Lee et al., “Performance Comparison of Various Configurations of Single-Pump Dispersion-Compensating Raman/EDFA Hybrid Amplifiers,” IEEE Photonics Technology Letters, vol. 17, no. 4, pp. 765-767, Apr. 2005.

[8] A. Banerjee et al., “Wavelength-division-multiplexed passive optical network (WDM-PON) technologies for broadband access: a review,” Journal of Optical Networking, vol. 4, no. 11, Nov. 2005, pp. 737-758.

[10] W. Lee, M. Y. Park, S. H. Cho, J. Lee, C. Kim, G. Jeong, and B. W. Kim, “Bidirectional WDM-PON based on gain-saturated reflective semiconductor optical amplifiers,” IEEE Photonics Technology Letters, vol. 17, no. 11, pp. 2460-2462, Nov. 2005.

[11] D. P. Shea and J. E. Mitchell, “Long-Reach Optical Access Technologies,” IEEE Network, vol. 21, Sept. 2007, pp. 5-11.

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使用色散補償拉曼/摻鉺光纖混合式放大器應用於長距離高密度分波多工/分時多工被動式光網路之研究與設計

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