混合式光纖有線電視/16-QAM的正交分頻多工藉著單模光纖及塑膠光纖之大樓網絡傳輸系統

Hybrid CATV/16-QAM OFDM in-building networks over SMF and GI-POF transport

吳尚樺(Shang-Hua Wu)

指導教授 ： 呂海涵

國立臺北科技大學/電資學院/光電工程系研究所/碩士(2011年)

摘要

最近幾年，為了在有限的頻寬中提高整個頻寬的使用效率。數位調變的技術日漸被受到注視，例如64-QAM的調變、256-QAM，甚至是1024-QAM的數位調變訊號。除此之外，光通訊傳輸系統引進了原本被使用在電訊號傳輸系統的技術。特別是正交分頻多工這項技術, 此項技術能使的光通訊產業有著更大的一個突破。
在這篇論文中，我們主要提出了混合式光纖有線電視/16-QAM的正交分頻多工網路系統。混合式光纖有線電視和16-QAM的正交分頻多工網路系統透過單膜光纖以及塑膠光纖來傳輸給各個用戶端，而且此架構已經由實驗中被驗證出能得到一個良好的接收數值。
在這個系統中，我們利用1556奈米波段的光源去傳輸20公里單模光纖和25公尺的塑膠光纖，並且沒有在單模光纖和塑膠光纖的連接之間額外使用任何的波長轉換技術和電路板的控制。在實驗中，不僅僅在正交分頻多工的訊號上能的到一個符合標準的數值，在有線電視訊號數值的量測也皆能符合光纖為波傳輸系統的性能要求。

關鍵字

光纖有線電視 ； 正交分頻多工 ； 光纖微波 ； 塑膠光纖

並列摘要

Recent year, in order to achieve increase utilized bandwidth efficiently at limited bandwidth. So, technique of digital modulation is very important gradually, such us 64-QAM, 256-QAM, even 1024-QAM. Moreover, optical fiber transmission imported technique from electrical communication system. Especially, it imported technique of OFDM, which lead to optical communication has better developmental than conventional.
In this thesis, we main proposed a “Hybrid CATV/16-QAM OFDM in-bulding networks”. A hybrid CATV/16-QAM OFDM in-building network over a combination of single-mode fiber (SMF) and graded-index plastic optical fiber (GI-POF) transport is proposed and experimentally demonstrated with good qualities of service.
In this system, a 1556 nm optical signal is directly transmitted along with two fiber spans (20-km SMF + 25-m GI-POF). Without using any wavelength conversion or bridge circuit between SMF and POF connection, error free transmissions with sufficient low bit error rate (BER) values are achieved for 2.5Gbps/2.5GHz and 5Gbps/2.5GHz OFDM signals; as well as good performances of carrier-to-noise ratio (CNR), composite second-order (CSO), and composite triple beat (CTB) are obtained for CATV one. This proposed network reveals an outstanding one with economy and convenience to be installed.

並列關鍵字

fiber optical cable television ； orthogonal frequency division multiplexing ； radio over fiber ； plastic optical fiber

參考文獻

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