臺灣博碩士論文加值系統

現在的頻率量測儀器中，能夠精確的量測微波訊號頻率的最大範圍只有在幾十個Giga Hz內，若是想要量測到THz這種更高頻率的訊號就必須要靠一些THz量測系統，經由那量測系統上取得到我們所要的資訊，通常取一筆數據要花很長的時間。因此我們希望藉由光脈衝雷射和連續波半導體雷射的互鎖，令脈衝雷射的諧頻用來當作連續波半導體雷射的頻率標準。實驗的方法是我們先將雙波長連續波半導體雷射所輸出的雙波長雷射光打到光導天線產生出差頻訊號，再利用頻率合成器與脈衝雷射做相位鎖定，這樣一來當我們將我們就有相當穩定的脈衝雷射訊號(frequency comb)可以當作半導體雷射的頻率標準，進而取得差頻訊號的一些資訊，這時只要脈衝雷射的諧頻能到THz的等級我們所能量測到的差頻訊號就可以將THz訊號做互鎖。在這論文中我們的實驗架構最主要分成兩個部分，第一部份是做脈衝雷射時序紊亂度抑制的實驗，我們成功的將時序紊亂度由約7.5ps降至約880fs；第二部分即是利用脈衝雷射的諧頻訊號來當半導體雷射的頻率標準，並完成半導體雷射的穩頻，使得原本100MHz的頻率擾動降至4MHz ~10MHz。

We characterize the phase-locking between dual-wavelength cw semiconductor laser and mode-locked pulse laser. Through biting signal from dipole antenna generated by two various wavelength cw lasers, semiconductor laser could be locked to high order harmonic frequency of repetition rate of mode locked laser was demonstrated. In this thesis, our experiment is be to divided into two parts, part one : we success to depressed timing jitter of mode-locked laser from 7.5ps to 880fs. Part two : We use the harmonic frequency of mode-locked laser as the standard of dual-wavelength cw semiconductor laser and to stabilize the frequency of laser diode .We depress the frequency fluctuation of laser diode from 100MHz to 4~10MHz.

中文摘要
英文摘要
誌謝
目錄
第一章 緒論
1.1 研究動機
1.2 研究構想
1.3 連續波波長可調半導體雷射與鎖模光脈衝雷射系統
1.4 論文架構
第二章 訊號穩定度的量測方法
2.1 鎖模雷射時序紊論度形成的因素
2.2 連續波鎖模雷射時序紊論度的分析
2.3 被動鎖模雷射時序紊論度的量測方法
2.4 連續波半導體雷射的頻率漂移
2.5 連續波半導體雷射的穩定度的量測
第三章 系統原理與實驗方法
3.1 鎖模雷射時序紊亂度的抑制方法
3.1.1 被動鎖模鈦藍寶石雷射系統
3.1.2 鎖相迴路基本原理及其架構
3.1.3 光導開關的基本原理
3.1.4系統上其他電路分析
3.1.5 實驗方法
3.2 半導體雷射與鎖模雷射互鎖的方法
3.2.1 雙波長半導體雷射系統
3.2.2 雙波長半導體雷射與鎖模雷射互鎖的基本原理及實驗架構
3.2.3 時間閘門半導體雷射穩頻法
第四章 實驗結果與討論
4.1 鎖模雷射穩頻實驗結果與比較
4.2 雷射互鎖後連續波波長可調半導體雷射的穩頻現象
第五章 總結與未來展望

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