多波長產生器搭配不同傳輸架構應用於高密度分波多工系統之長距離傳輸的研究與設計

Study and Design on Multi-Wavelength Generator with Different Structure for Long Haul Transmission in DWDM System

張軻宇(Ke Yu Chang)

指導教授 ： 賴柏洲 ； 孫卓勳

國立臺北科技大學/電資學院/電腦與通訊研究所/碩士(2013年)

摘要

本論文提出三種不同傳輸架構，上下行比較兩組不同的調變碼，驗證使用多波長產生器(Multi-Wavelength Generator；MWG)產生多載波搭配不同傳輸架構，將下行光源再調變用於上行，而上下行使用波長再利用可有效利用頻寬和提升傳輸距離，以達到論文中要求的長距離被動式光網路系統。
論文裡，提到了雙向的長距離傳輸系統之分波多工被動式光網路(Wavelength Division Multiplexing Passive Optical Network；WDM-PON)去搭配三種不同的傳輸架構，其中下行部分將MWG運用在光線路終端(Optical Line Terminal；OLT)，再利用兩個分佈式回授雷射二極體(Distributed Feedback-Laser Diode；DFB-LD)為發射端，產生出16個做為雙向傳輸的載波，下行傳輸速率為10 Gbit/s；除了前面討論的部分之外，同時在光網路單元(Optical Network Unit；ONU)端，驗證使用MWG產生多載波以及搭配colorless技術，將下行光源重新調變應用於上行傳輸，有效節省DFB-LD的成本，可以將總傳輸距離提升到150 km以上。

關鍵字

多波長產生器 ； 長距離被動式光網路系統 ； 分波多工被動式光網路

並列摘要

We propose the three different transmission structure comparing two groups of modulations in downstream transmission and upstream transmission. Expriments verify that we utilize the different transmission structure to match the MWG generating multi-carrier as the upstream channels and downstream channels. Hence, the results showed that using the method of wavelength reusing can raises the transmission distance of Passive Optical Network(PON) and achieve the Long-Reach PON which the paper request.
In this thesis, we propose a bidirectional long-reach Wavelength Division Multiplexing Passive Optical Network(WDM-PON) to collocate three different transmission structure. Structure in the downstream uses two Distributed Feedback-Laser Diodes (DFB-LD) as transmitter connected with Multi-Wavelength Generator (MWG) which can generate 16 carriers as downstream channels with 10 Gbit/s bit rate at the Optical Line Terminal (OLT). In addition of that we discuss before, the simulations verify that using the MWG to generate multi-carrier and using the colorless technique that are re-modulated as the upstream channels can reduce the cost of DFB-LD and we can enhance the total transmission distance upto 150 km.

並列關鍵字

MWG ； Long-Reach PON ； WDM-PON

參考文獻

[2] D. K. Hunter, P. J. Legg, and I. Andonovic, “Architecture for large for large dilated optical TDM switching network,” IEE PROCEEDINGS-J, vol. 140, no. 5, Oct. 1993.

[3] B. Mukherjee, “WDM-Based local lightwave networks-Part I: single-hop systems”, IEEE Network, vol.6, pp.12-27, May 1992.

[4] W. Li, M. Chen, Y. Dong, and S. Xie, “All-Optical Format Conversion From NRZ to CSRZ and Between RZ and CSRZ Using SOA-Based Fiber Loop Mirror,”IEEE Photonics Technology Letters, vol. 16, no. 1, pp. 203-205, Jan. 2004.

[5] M. Daikoku, N. Yoshikane, and I. Morita, “Performance comparison of modulation formats for 40 Gbit/s DWDM transmission systems,” in Proc. Optical Fiber Communication Conf.(OFC2005), vol. 5, Mar. 2005, pp. 3-5.

[6] C. W. Chow, “Wavelength Remodulation Using DPSK Down-and-Upstream With High Extinction Ratio for 10-Gb/s DWDM-Passive Optical Networks,” IEEE Photonics Technology Letters, vol. 20, no. 1, pp. 12-14, Jan. 2008.