混合式光纖微波/光纖傳輸系統

Hybrid ROF/FTTH Transport System

莊婉鈴(Won-Ling Chuang)

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

光纖微波與光纖到府傳輸系統的整合提供一個非常好的方式在有線與無線的傳輸技術。考慮多波長光載波的產生可同時在傳輸系統存有ROF訊號，可使系統更符合成本效益。因此，光纖微波與光纖到府傳輸利用在多波長光載波來提供多種服務變的更有潛力。然而最近有很多多波長光載波產生的方法被提出，像是四波混頻在非線性介質、光外差雙頻、外部調變。一般來說，外部調變技術利用簡易的發射機來產生多波長光載波比較引人注意。在此篇研究中，提出了幾種利用直接調變與外部調變來產生多波長光載波探討其特性與差異，並利用其中一個方法應用在混合式光纖微波與光纖到府傳輸系統。
此外，我們也提出一個全雙工混合式的光纖有線電視/微波傳輸系統中，雷射直接調變多載波的電視訊號，經光纖傳送，再經過相位調變器，調變另一數位訊號回到頭端。本論文提供兩個架構，一個為傳輸兩種訊號，分別為強度調變的光纖有線電視及相位方式調變的微波訊號。另一個架構是利用不同的調變方式來產生多波長光載波並應用於混合式光纖微波與光纖到府傳輸系統中。

關鍵字

直接調變 ； 外部調變 ； 光纖微波 ； 相位調變 ； 多波長

並列摘要

Radio-on-fiber (ROF) technologies with fiber to the home (FTTH) transmission system provide a very promising candidate to combine the advantages of wireline and wireless. Considering optical multi-wavelength generation for the ROF signals coexist within the same transport system in order to become truly cost-effective. Therefore, FTTH combined ROF transmission utilized multi-wavelength for multi services has much potential. However, many approaches of optical multi-wavelength carrier generation have reported recently, such as four-wave mixing in nonlinear medium (FWM), optical double-frequency heterodyning, external modulation. Generally speaking, the external modulation scheme is more interest with multi-wavelength carrier generated with a simplified transmitter. In this structure, we presented several methods of optical multi-wavelength generation using direct modulation and external modulation, and discuss the features between them. Then we used one of them to apply at hybrid ROF/FTTH transmission system.
Furthermore, we presented and demonstrated a full-duplex hybrid CATV/ROF transport system that using a phase re-modulated technology that directly modulated laser to generate downstream Multi-carrier CATV signal and provide upstream radio signals. In this research, we present two architectures; one of them is transmission two kinds of signal that intensity modulated CATV signal and phase modulated RF signal. The other one is optical multi-wavelength carrier generation utilizes different kind of modulations and makes application in transmission system.

並列關鍵字

Directly modulated ； externally modulated ； radio over fiber ； phase modulation ； multi-wavelength

參考文獻

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