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標題: | 穿隧接面電晶體雷射物理模型與其零啁啾通訊之研究 Physical Model and Chirp-free Communication of Tunnel Junction Transistor Lasers |
作者: | Chien-Ting Tung 董建廷 |
指導教授: | 吳肇欣(Chao-Hsin Wu) |
關鍵字: | 電晶體雷射,穿隧接面電晶體雷射,法蘭茲-凱爾迪西效應,光頻率響應,頻率啁啾,光纖通訊, Transistor laser,Tunnel junction transistor laser,Franz-Keldysh effect,Optical frequency response,Frequency chirping,Optical fiber communication, |
出版年 : | 2020 |
學位: | 碩士 |
摘要: | 穿隧接面電晶體雷射 (TJTL) 是一種新型的光源,它的操作方式就像電晶體一樣,而且還擁有電與光的雙重輸出。除了和一般二極體雷射一樣有電流調變,在基極-集極接面的強力電場會造成法蘭茲-凱爾迪西效應 (Franz-Keldysh effect),這使得基極-集極接面形同一個內建的電吸收調製器。因此在穿隧接面電晶體雷射中,光輸出除了可以用傳統的電流輸入來控制外,我們還能利用基極-集極接面的電壓來進行調控。在這篇論文中,我們建立了穿隧接面電晶體雷射的理論模型,其中包括了基於量子井與腔內法蘭茲-凱爾迪西光子協助穿隧而修改的電荷控制模型和雷射速率方程式。藉由這個理論模型,我們模擬了穿隧接面電晶體雷射的直流與交流特性,並且我們探討了集極參雜濃度,量子井在基極的位置,不同小訊號的操作模式與元件的大小尺寸,對於穿隧式電晶體雷射的性能表現的影響。 另一方面,我們也研究了穿隧接面電晶體雷射的頻率啁啾響應。電流調變與電壓調變同樣會使穿隧接面電晶體雷射產生啁啾。我們研發出了一種系統架構,同時使用電流調變與電壓調變來使得最後的光輸出的啁啾為零。只要我們選用適當的輸入信號,穿隧接面電晶體雷射所產生的光訊號,就能在長距離的光纖通訊當中以不失真的方式傳播。 Tunnel junction transistor laser (TJTL) is a new type of optical transmitter which can be modulated as a transistor and has dual electrical and optical outputs. In additional to the direct current modulation of diode lasers, the strong electrical field in the BC junction causes the Franz-Keldysh effect which acts as an internal electro-absorption modulator. Therefore, TJTL can not only control the photon output with the current injection but also the BC junction voltage. In this work, we construct the theoretical model to TJTLs including the charge control model and the modified laser rate equation describing the quantum well effect and intracavity Franz-Keldysh photon assisted tunneling. With this model, we simulate the DC and AC characteristics of the TJTL and study the effect of the collector-doping concentration, quantum well position, small-signal configuration and the device size on the performance of TJTLs. On the other hand, we investigate the chirps induced by the current and voltage modulation of TJTLs. The principle of generating the chirp-free signals using the dual current and voltage modulation of TJTLs is demonstrated. With the proper setting of pulse shapes for the inputs, we simulate that optical signals from TJTLs can be used for the long-distance optical fiber communication without distortion. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/57838 |
DOI: | 10.6342/NTU202001580 |
全文授權: | 有償授權 |
顯示於系所單位: | 電子工程學研究所 |
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U0001-1607202020213000.pdf 目前未授權公開取用 | 6.33 MB | Adobe PDF |
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