應用法布里-珀羅雷射互注技術於混合式光纖/微波分波多工傳輸系統

Radio-on-Hybrid WDM Transport Systems Based on Mutually Injection-Locked Fabry-Perot Laser Diodes

李忠益(Chung-Yi Li)

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(2008年)

摘要

在本篇論文，我們提出及驗證不同的CATV與ROF的傳輸系統，其中架構包含於雙向式系統、分波多工技術、全雙工環形網路及混和式訊號傳輸。
在第一個架構中，我們應用法布里-珀羅雷射雙注入鎖模技術建構於雙向光纖微波傳輸系統，且研究探討在雙向傳輸系統可傳輸40公里以上之單模光纖。在本文提出的系統架構量測中可以得到較好的誤碼率(BER)及錯誤向量振幅(EVM)的值。此外，本文所提出的雙向光纖微波傳輸系統只使用一法布里-珀羅雷射來傳輸上行及下行的傳輸系統，使系統架構的優勢較於簡單且大幅降低成本。
第二個系統架構，我們應用DFB雷射二極體進行主模與側模注入技術，並成功注入鎖模DFB雷射二極體的主模與多個側模模態，此外，每個注入鎖模的側模抑制比也同時被提高，我們可運用此技術得到全新的多根光源，並可應用於混合式光纖微波分波多工傳輸系統上提供多重服務。
第三個系統架構，我們應用互相注入的FP LD來建構一個混合式分波多工傳輸系統。經由兩個FP LD的互相注入，可以得到一個平坦且多模態的輸出光源，使用此光源建構之混合式分波多工傳輸系統同時傳送類比及數位訊號，並經過100公里單模光纖傳輸。
最後一個架構中，我們應用互相注入的FP LD來建構一混合式光纖微波分波多工傳輸系統。在CATV的參數量測下，我們能夠得到良好的載波雜訊比、載波二次合成拍差比和載波三次合成波差比。且我們所建構之分波多工傳輸系統是使用低成本的FP雷射，因此在價錢上比起傳統的分波多工傳輸系統而言相當具有優勢。

關鍵字

寬頻光源 ； 法布里-珀羅雷射二極體 ； 分佈反餽式雷射二極體 ； 注入鎖模 ； 混合式光纖微波分波多工傳輸系統

並列摘要

In the thesis, we propose and demonstrate various fiber optical cable television (CATV) and radio-on-fiber (ROF) transport system, which include architectures of bidirectional system, wavelength-division-multiplexing (WDM) techniques, full-duplex ring network and hybrid signals transmission.
In the first architecture, we study a full-duplex radio-over-fiber (ROF) transport system based on two modes injection-locked Fabry-Perot laser diode (FP LD) is proposed and demonstrated. Transmission performances over 40 km of a standard single-mode fiber (SMF) for full-duplex transmission were investigated. Good performances of bit error rate (BER) and error vector magnitude (EVM) were obtained in our proposed systems.
In the second architecture, we propose a one distributed feedback (DFB) laser diode with main and multiple side modes injection-locked is proposed and demonstrated. DFB laser diode can be successfully injection-locked not only in the main mode but also in different side modes. Besides, the side-mode suppression ratio (SMSR) value of each injection-locked mode is enhanced, it means that a new approach is suitable for the use of multiple optical sources. Our proposed scheme has the potential to be used as optical sources for radio-on-wavelength division multiplexing (WDM) transport systems to provide multi-service.
In the third architecture, we build a hybrid wavelength-division-multiplexing (WDM) transport system based on mutually injection-locked Fabry-Perot laser diodes (FP LDs) for CATV, 256-QAM and OC-48 transmission is proposed and demonstrated. Mutually injection-locked FP LDs as broadband light source could be relatively simple and cost-effective compared with other demonstrated light source schemes. The proposed hybrid WDM transport system employs four filtered wavelengths (modes) to transmit one hundred and eleven AM-VSB channels, four 256-QAM digital passband channels, and one OC-48 digital baseband channel simultaneously. Since our proposed system does not use multiple distributed feedback (DFB) LDs, it reveals a prominent one with simpler and more economic advantages.
In the final architecture, we propose a radio-on-hybrid wavelength-division- multiplexing (WDM) transport system employing mutually injection-locked Fabry-Perot laser diodes (FP LDs) is proposed and demonstrated. System performances evaluated by carrier to noise ratio (CNR), composite second order (CSO), composite triple beat (CTB), bit error rate (BER) and third order intermodulation distortion to carrier ratio (IMD3/C) for simultaneous transmission of CATV/LAN/ITS are improved. Our proposed systems are relatively simple and potentially low cost due to the use of mutually injection-locked FP LDs as broadband light source (BLS).

並列關鍵字

Broadband light source ； Fabry-Perot(FP) laser diodes ； distributed feedback (DFB) laser diode ； Injection-Locked ； Radio-on-Hybrid WDM

參考文獻

[71] Y. C. Chi, “Hybrid Wavelength-Division-Multiplexing Transport System,” National Taipei University of Technology, 2007.

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