在許多光電和雷射系統應用中需要使用到緊緻、多功能與高效率的光學元件。準相位匹配材料中獨特的積體式電光效應加上本身所具備的高效率非線性頻率轉換能力可用來開發許多引人注目的單塊晶多功能元件。延續過往的研究成果，在本論文中研究與論證了幾個在週期式與非週期式極性反轉鈮酸鋰(PPLN/APLN)中實現的多功能積體式光電與雷射元件。它們都利用準相位匹配晶體中可工程化的鐵電結構用以最佳化並同時實現前述之電光與非線性多功能光電與雷射系統。這些元件有極大的潛力應用在光通訊、光儲存、生醫、顯示技術與遙測等用途上。
於第一章，將會簡介研究動機與背景。於第二章，將會說明電光式準相位匹配之理論與工作原理。於第三章，將會詳細論述利用一塊釹鎂摻雜週期式極性反轉鈮酸鋰(Nd:MgO:PPLN)晶體實現一波長為 1.085 μm之雷射泵激電光式內部Q調制雷射系統之設計、建造與實驗論證之方法與流程。於第四章，首次實驗論證利用一APLN晶體實現主動式窄帶多波長濾波器之設計大綱將會被提出。於第五章，將會論證與分析一新穎的電光式Q調制腔內二倍頻(SHG)釹釩酸釔雷射，它使用了一塊經過優化設計之單一光柵結構APLN晶體，可同時實現一個雷射Q開關與一個二倍頻產生器。於第六章，將會提出建立於單塊PPLN的一個增益被提高與頻譜被窄化的光參數振盪器(OPO)，其整合了一個光參數產生器與兩個電光式偏極化模態轉換器。文中也會論證其獨特的OPO信號頻譜處理能力。此研究工作的總結與未來展望最後會在第七章與第八章分別被提出。
這些成功的論證無疑地是發展非線性積體光學多項實質應用的重大進展。據此進展而研發的數個先進非線性積體光電與雷射元件正持續研究中。

Compact, multi-function yet efficient optical devices are in great demand in many photonics and laser systems and applications. The ingenious integration of the unique electro-optic (EO) effects of a quasi-phase-matching (QPM) material with its capability of performing efficient nonlinear frequency conversion has led to the development of many attractive monolithic multi-function devices. To continue and extend these efforts and achievements, several advanced integrated photonics and laser devices of capable of performing multiple optical functions based on periodically and aperiodically poled lithium niobate (PPLN/APLN) devices were studied and demonstrated in this dissertation work. They were realized upon the idea of manipulation of the engineerable domain structure of a QPM crystal to optimize performing the prescribed EO and nonlinear-optic (NLO) processes simultaneously to achieve the multi-function operation in photonics and laser systems. These devices are of potential for applications in optical communications, optical storages, biomedicine, displays, remote sensing, etc.
In chapter 1, the motivation and background introduction of this study will be given, while in chapter 2, the theory and working principles of EO QPM devices will be introduced. In chapter 3, the design, construction, and experimental demonstration of a laser-diode-pumped, electro-optically internal-Q-switched laser system radiating at 1.085 μm fabricated using a periodically poled Nd:MgO:LiNbO3 (Nd:MgO:PPLN) crystal will be detailed. In chapter 4, a design scheme for and the first experimental demonstration of active narrowband multi-wavelength filters based on APLN crystal will be presented. In chapter 5, a novel electro-optically Q-switched intracavity second-harmonic generation (SHG) Nd:YVO4 laser by using a single-grating-structure APLN crystal optimized for simultaneously performing a laser Q-switch and a second-harmonic generator will be revealed and characterized. In chapter 6, a gain-enhanced and spectral-narrowed optical parametric oscillator based on a monolithic PPLN integrating an optical parametric generator with two electro-optically active polarization-mode converters will be reported. Unique spectral manipulation of the OPO signal will also be demonstrated. The summary and outlook of this work will finally be given in chapters 7 and 8, respectively.
The success of these demonstrations will certainly be a significant step in advancing the nonlinear integrated optics essential for various applications. The study and development of several derived and advanced nonlinear integrated photonics and laser devices are under way.

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