混和型拉曼/摻鉺光纖放大器之高速正交分頻 多工系統被動光網路系統應用雪崩式光電二極體與人工神經網路

Hybrid Raman/Erbium-Doped Fiber Amplifier for High Speed OFDM Long-Reach Passive Optical Network System Employing Avalanche Photodiode and Artificial Neural Network

劉哲甫(Che-Fu Liu)

指導教授 ： 陳智弘

國立交通大學/電機學院/光電工程系所/碩士(2018年)

摘要

由於對網路服務的需求與日俱增，資料傳輸量的需求也日漸增大，而長距離被動式光網路是目前能提供高資料傳輸量與大頻寬的不二人選。隨著網路涵蓋率在世界各地的主要城市逐漸擴大，每一個光傳輸系統的成本也成為現今科學家所爭相研究的議題。因為成本較低，強度調變直接檢測系統已經被廣泛使用在存取網路中，此外，正交分頻多工被應用在光傳輸系統因為其高傳輸容量與高頻譜效益。
國際組織ITU-T制定了命名為NGPON2的次世代被動光網路，其標準為光纖傳輸須具備40Gbps的傳輸量，並提供10Gbps的對稱上行下行傳輸速度給每個使用者。
為了在現有的資料傳輸率使提供的光網路單位更多，拉曼放大器被應用在長距離被動式光網路中，而人工神經網路也被用來當作下個世代的數位訊號處理器，並期待能得到比Volterra非線性等化器更好的效果。
本篇論文中，我們架設了一個正交分頻多工強度調變直接檢測長距離被動式光網路架構，並從以下三個角度進行討論：1. PIN 二極體與雪崩式光電二極體 2. 有無加裝拉曼放大器 3. Volterra 非線性等化器與人工神經網路。

關鍵字

拉曼 ； 正交分頻多工 ； 被動光網路 ； 人工神經網路 ； 雪崩式光電二極體

並列摘要

Due to the growing demand for broadband services, the need of data transmission becomes larger, and long-reach passive optical network (LR-PON) has been the best candidate to provide high data rate and bandwidth. Because the coverage of the network in main cities over the world is getting larger, the cost in each optical communication system becomes an issue that researchers have been studied. Hence, intensity modulation direct detection (IMDD) has been widely used in metro access network for the low cost. Besides, orthogonal frequency division modulation (OFDM) is employed to achieve higher capacity and spectral efficiency.
In the standard of next-generation PON (NG-PON2) which was developed by ITU-T, an architecture need to be capable of total network throughput of 40 Gbps, corresponding to up to 10 Gbps symmetric upstream/downstream speeds available at each subscriber.
The Raman Pump Amplifier is employed into OFDM IMDD LR-PON in order to provide more optical network unit (ONU) under current data rate, while the Artificial Neural Network (ANN) is utilized to be the new generation equalizer which is expected to have better performance than the Volterra Nonlinear Equalizer (VNLE) in the future.
In this paper, we demonstrate a high speed OFDM IMDD LR-PON structure. Then we compare the performance in three aspects: 1. Positive Intrinsic Negative (PIN) photodiode and Avalanche Photodiode (APD) 2. With or without Raman Pump Amplifier 3. VNLE and ANN.

並列關鍵字

Raman ； OFDM ； Passive Optical Network ； Avalanche Photodiode ； Artificial Neural Network

參考文獻

[1] http://com480amywilliams.blogspot.com/2016/04/the-evolution-of-media-technology.html

[2] http://www.visualcapitalist.com/internet-minute-2018/

[3] Cisco,” Visual Networking Index : Forecast and Methodology,”2014–2019 (2015)

[4] Global Passive Optical Network Market is expected to Robust at 21.3% CAGR during the Forecast Period – Research Nester http://www.researchnesterblog.com/global-passive-optical-network-market-expected-robust-21-3-cagr-forecast-period-research-nester/

[5] ITUT G.989.1, “40-Gigabit-capable passive optical networks (NG-PON2): General requirement (2013)