使用光源注入與光電子迴授技術改善光纖微波傳輸系統

Employing Light Injection and Optoelectronic Feedback Techniques to Improve ROF Transport Systems'Performances

陳冠霖(Guan-Lin Chen)

指導教授 ： 曾世杰

國立臺北科技大學/電資學院/光電工程系研究所/碩士(2007年)

摘要

在本篇論文中，我們提出三個系統架構，分別為，微波多模光纖系統、高密度分波多工-微波系統及光纖有線電視系統，並使用外部光源注入與光迴授技術改善的其效能。
第一個系統架構，我們提出並且驗證ㄧ個具有低成本及有潛力的微波多模光纖系統，建構在垂直共振腔面射型雷射 (VCSEL) 與一個外部光源注入及光電子迴授技術上，並符合IEEE 802.11a/b的規範。可以獲得較好的錯誤向量 (EVM)、互調失真對載波比 (IMD/C)及誤碼率 (BER)，這樣的微波多模光纖傳輸系統適合應用在短距離的毫米波段光纖網路上。
第二個系統架構，我們提出並且驗證ㄧ個雙向高密度分波多工-微波系統，建構在垂直共振腔面射型雷射 (VCSEL) 與一個外部光源注入及光電子迴授技術上。可以獲得較好的錯誤向量 (EVM)、互調失真對載波比 (IMD/C)及誤碼率 (BER)。這樣的Radio-on-DWDM現在巳經成功能運作在寬頻微波光纖分佈網路上。
第三個系統架構，我們以直接調變的方式來傳送美規NTSC的AM-VSB類比信號。利用半頻多工（half-split band）、外部光源注入及光電子迴授技術改善光纖有線電視系統，讓信號在經過100 km的單模光纖（SMF）傳輸後，系統仍能得到很好的載波雜訊比、載波合成二次拍差比及載波合成三次拍差比數值。

關鍵字

外部光源注入技術 ； 光電子回授技術 ； 垂直共振腔面射型雷射

並列摘要

In this thesis, we propose external light injection technique and optoelectronic feedback techniques to improve the radio-on-multimode fiber (MMF), radio-on-dense- wavelength-division-multiplexing (DWDM) transport system and split-band directly modulated fiber optical cable television (CATV) transport systems’ performance.
First, we proposed and demonstrated a potentially low-cost radio-on-MMF system for IEEE 802.11a/b applications based on VCSELs injection-locked and optoelectronic feedback techniques. Good performances of intermodulation distortion to carrier ratio (IMD/C), error vector magnitude (EVM), and bit error rate (BER) were obtained in our proposed systems. Such a proposed radio-on-MMF system will benefit the deployment of the short-haul microwave optical link.
Second, we proposed and demonstrated a bidirectional radio-on-DWDM transport system based on VCSELs injection-locked and optoelectronic feedback techniques. Good performances of BER, EVM, and IMD/C were obtained in our proposed systems. This demonstrated that such a radio-on-DWDM transport system has been successfully present, which can inter-operate with broadband ROF distribution networks.
Finally, A directly modulated AM-VSB CATV erbium-doped fiber amplifiers (EDFA)-repeated system that uses half-split-band, light injection and optoelectronic feedback techniques is proposed and demonstrated. The techniques improve the overall performance of the fiber optical CATV system. Good performances of CNR/CSO/CTB were achieved for the full channel band over a 100-km single-mode fiber (SMF) transport.

並列關鍵字

Light Injection ； Optoelectronic Feedback ； VCSEL

參考文獻

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