具有高功率、超寬頻表現在W-頻段(75-110GHz)的光子傳輸器

Abstract

於本論文中，我們驗證了一結構新穎且與近彈道單載子傳輸光檢測器整合於一起的寬頻光子傳輸器，此光子傳輸器使用新的準八木宇田天線之發射器，並且與近彈道單載子傳輸光檢測器同採用槽線結構。由於此次研究採用槽線結構，所以設計上不需使用過去研究採用之扇形結構轉接器（共平面波導轉槽線結構轉接器），而因此光電響應能達到涵蓋整個W頻段（75-110GHz）的目標。除此之外，此次新設計的光子傳輸器之中段部分由於有加入帶通濾波器，故我們能輕易地將光電響應與偏壓調變響應之訊號各別獨立分開，而不致互相干擾。也因此我們的元件偏壓調變頻寬可以將近至15GHz而不會犧牲掉光電響應的頻寬。與先前的研究相比，此次偏壓調變頻寬大了將近三倍，而再與目前提出運用於W頻段的光子傳輸器之文獻相比，我們提出的光子傳輸器擁有非常高的調變速度。

In this thesis, we demonstrated a novel near-ballistic uni-traveling-carrier photodiode (NBUTC-PD) based broadband photonic transmitter, which consist of a slot-line NBUTC-PD and a novel Quasi-Yagi radiator. Compared to our previously demonstrated device, in this study, we use a slot-line transmitter and photodiode instead of a fan-shape transition. Our newly photonic transmitter can achieve a much wider optical-to-electrical (O-E) bandwidth ,even covering full W-band(75-110GHz) . Furthermore, by inserting an additional band-pass filter in our novel radiator, we can optimize its O-E response and modulation response independently. The modulation bandwidth can thus be greatly improved to ~15GHz without sacrificing its O-E bandwidth, which is more than 3 times wider than our previous design. As compared to reported W-band photonic transmitter-mixer, the demonstrated device exhibits extremely high modulation speed.