整合光纖有線電視與正交分頻多工光纖到家網路系統

A Hybrid CATV/QPSK OFDM Fiber-to-the-Home Devices Network

魏文華(Wen-Hua Wei)

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(2013年)

摘要

隨著用戶對頻寬的要求及有線電視網路傳輸互動式多媒體資訊的趨勢，全球有線電視網路以普遍朝著光纖化方向。由於光纖能提供更大的傳輸容量與低的傳輸損失等優點，使得傳輸距離可以大大被延伸，光纖網路更具彈性使用及更確保光纖網路的安全及穩定性。
本論文提出兩個架構，第一個架構為整合光纖有線電視與正交分頻多工光纖到家網路系統。此系統使用20公里單模光纖和25公尺塑膠光纖去傳輸光源，在這兩個光纖之間沒有增加任何波長轉換機制和電路板控制。在這實驗中，OFDM訊號符合標準情況下，有線電視訊號的性能量測皆有達到良好數值。
第二個架構為雙向相位調變混合式有線電視/微波傳輸系統。此系統採用光纖光柵將相位調變的混合訊號轉強度調變，並且透過單模光纖和光子晶體光纖傳輸。最後，我們在接收端分析有線電視訊號及誤碼率皆能符合光纖微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

With the bandwidth requirements of customers and the tendency to transmit interactive multimedia information in cable television network. Due to the optical fiber to provide greater transmission capacity and low transmission loss, which makes the transmission distance can be extended greatly, fiber-optic network more flexible and ensure to security and stability of fiber-optic network.
This thesis proposed two systems, the first architecture is an in-building network based on CATV integration with QPSK OFDM over a combination of single-mode fiber (SMF) and perfluorinated graded-index plastic optical fiber (PF GI-POF) transport is proposed and experimentally demonstrated. In the system, the optical signal is transmitted through two fiber spans (20-km SMF + 25-m GI-POF).There is no any wavelength conversion or bridge circuit between the two fibers. Error free transmission with sufficient low bit error rate (BER) values were achieved for QPSK OFDM signal, as well as acceptable performances were obtained for CATV one.
The second architecture is a bidirectional phase-modulated hybrid cable television/radio-over-fiber lightwave transport system is proposed and demonstrated. The system employing fiber Bragg grating tilt filter as a phase modulation-to-intensity modulation conversion and a system link with a transmission length of 41.43 km consists of one SMF span (40 km) and one photonic crystal fiber (PCF) span (1.43 km). Impressive performances of carrier-to-noise ratio, composite second-order, composite triple-beat, and bit-error rate are obtained in the receiving site.

並列關鍵字

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

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