正交分頻多工被動光網路系統分波多工達高速和高損耗預算

Abstract

隨著科技的進步，數位資訊需求量大增，使得區域型網路流量成指數倍成長，被動式光網路系統成為主要科技之一。為了達到國際標準組織FSAN制訂的下世代被動光纖網路的標準NGPON2，必須將光纖距離範圍從20公里延伸至100公里，並且提供40Gbps網路傳輸量並支援每個用戶1Gbps 的使用傳輸量。光直調偵測正交分頻多工長距離被動光網路系統具有良好的頻寬使用效率以及較低的成本，對於NGPON2的標準是近年來非常適合的一個解決辦法。 我們將正交分頻多工被動光網路系統應用至四個通道分波多工系統中，利用自相位調變方式(SPM)解決RF Power Fading的問題，隨著矽晶體的發展應用數位訊號處理(DSP)的技術，使用非線性失真補償技術提高傳輸量。我們用實驗驗證正交分頻多工技術在四個通道分波多工系統中，傳輸過程沒有加光放大器並且使用10GHz的電吸收調變器(EAM)和感光二極體(PIN)，傳輸60公里可以達到200Gbps的傳輸量，每個通道擁有30-dB的高損耗預算，因此，可以支援128位用戶超過1.5Gbps的使用傳輸量。

With the advance in technology, increased demand for digital information. The flow of metro traffic grows exponentially, passive optical network system becomes one of the major technology. In order to meet the standards of next-generation PON (NGPON2) by Full Service Access Network (FSAN), the fiber distance range must be extended from 20 km to 100 km and provides 40-Gbps network transmission capacity to support 1-Gbps data rate for optical network unit (ONU). The Optical OFDM LR-PON with intensity modulation and direction (IMDD) system offer high spectral efficiency and low cost. It’s very suitable for NGPON2 in recent years. We employ OFDM LR-PON system to the four channels WDM system. We take the self-phase modulation (SPM) into consideration to solve the RF power fading. With the growth of silicon, we apply digital signal processing (DSP) technology to improve the data rate by using non-linear distortion compensation technology. We experimentally demonstrate the WDM-OFDM LR-PON System without inline and pre-amplifier. Employing 10-GHz EAM and PIN, the data rate can reach 200-Gbps with 60-km transmission and each channel has 30-dB high loss budget. Therefore, the OFDM LR-PON transmission in a 4-channel WDM system can support 128 ONUs with >1.5-Gbps/ONU capacity.