English  |  正體中文  |  简体中文  |  Items with full text/Total items : 69937/69937 (100%)
Visitors : 23151347      Online Users : 409
RC Version 7.0 © Powered By DSPACE, MIT. Enhanced by NTU Library IR team.
Scope Tips:
  • please add "double quotation mark" for query phrases to get precise results
  • please goto advance search for comprehansive author search
  • Adv. Search
    HomeLoginUploadHelpAboutAdminister Goto mobile version

    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/68311

    Title: 一維/二維晶疇工程準相位匹配元件作為Q調制器、(多)波長轉換器及頻譜電光調控器並應用於雷射及光參量振盪器之研究;1D/2D domain engineered QPM devices for Q-switching, (multi-)wavelength conversion, and spectrum tailoring in lasers and optical parametric oscillators
    Authors: 張煒堃;Chang,Wei-Kun
    Contributors: 光電科學與工程學系
    Keywords: 準相位匹配;Q調制器;電光調控器;波長轉換器;光參量振盪器;鈮酸鋰;QPM;Q-switch;EO;NLO;OPO;Lithium Niobate
    Date: 2015-07-24
    Issue Date: 2015-09-23 11:19:34 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 雷射科技已經廣泛地運用在各式領域中,如光通訊、生醫、顯示技術、遙測和環境檢測;而這些應用所需要的特定波段和光源特性大都可利用獨特且可設計的非線性光子晶體之準相位匹配技術和電光調制能力來達成。延續過往的研究成果,本論文展示了在鈮酸鋰晶體上製作出一維或二維且週期性乃至非週期性結構,配合該晶體優良的非線性波長轉換和電光調制的能力,作為有效率地積體化多功的主動式雷射元件。



    ;Laser technology has been widely implemented into many fields, such as light communication, bio-medicine, display technology, remote sensing, environmental detection. Compact, multi-functional yet efficient optical devices are desired in many photonics and laser systems and applications. In this dissertation, those requirements can be potentially fulfilled by introduced one-dimensional (1D) or two-dimensional (2D) periodic or aperiodic photonic devices with the high integration of the electro-optical (EO) modulation, the nonlinear wavelength conversion, and the laser gain medium doping.

    In the very first two chapters, the research motivation and background will be introduced, and the theories of the electro-optic effect of lithium niobate crystal will be basically discussed. In the chapter three, 2D nonlinear phtonic devices are demonstrated to perform laser Q-switch as well as optical parametric gain medium (OPGM) simultaneously. Continuous wavelength tuning of the IOPO signal in the eye-safe region via the temperature control of the 2D PPLN and 2D Nd:MgO:PPLN were also achieved. The introduction and description of the desired active laser devices designed by aperiodic optic superlattice (AOS) and optimized by simulated annealing (SA) method will follow. The 1D-/ 2D-NPC based on the developed algorithm with multiple functionalities, including EO Q-switch, EO polarization mode converter (PMC), intracavity second-harmonic generator (ISHG), intracavity sum frequency generator (ISFG), intracavity optical parametric oscillator (IOPO), for variety applications are be reported.

    In the chapter four, we demonstrate an electro-optically spectrum tailorable IOPO basked on a novel APPLN device working simultaneously as an multi- wavelength OPDC and an EO PMC (an active wavelength filter) in a diode-pumped Nd:YVO$_4$ laser. A calculation model has been developed to construct the domain structure of the APPLN and to predict the output spectrum of the built EOST IOPO. The measured output signal spectrum of the EOST IOPO producing two narrowed spectral peaks when operated at E$_y$= 150 V/mm at a diode pump power of 4.7 W. Both spectral bandwidths of the two signals were below 0.06 nm (which reaches the resolution limit of the OSA). According to the simulation, not only the signal spectrum but also the idler spectrum can be electro-optically tailored, leading the system to generate narrowed multiple signals and idlers at near- and mid-IR regions, respectively.

    Other than forming a spatial structure by the conventional 1D or 2D grating, in the fifth chapter, we design and construct a unique horn-shaped-fan-out-double-prism domain (or ramped duty-cycle) PPLN crystal that integrates the functionalities of an EO beam deflector and an OPDC to work in a compact diode-pumped, 1064-nm Nd:YVO$_4$ laser to realize an efficient EO tunable pulsed IOPG/IOPO. The horn-shaped-fan-out-DPD PPLN crystal can work as an EO beam deflector with a normalized deflection sensitivity of 0.36$^o$/kV-cm and can simultaneously work as a QPM wavelength converter for performing the 1064 nm pumped optical parametric down converter in a range of 1863 - 1929 (by applying -750 V to 750 V). The signal wavelength tuning of the IOPG/IOPO via the electric-field control of the horn-shaped-fan-out-DPD PPLN could be demonstrated in the Mid-IR band.
    Appears in Collections:[光電科學研究所] 博碩士論文

    Files in This Item:

    File Description SizeFormat

    All items in NCUIR are protected by copyright, with all rights reserved.

    社群 sharing

    ::: Copyright National Central University. | 國立中央大學圖書館版權所有 | 收藏本站 | 設為首頁 | 最佳瀏覽畫面: 1024*768 | 建站日期:8-24-2009 :::
    DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU Library IR team Copyright ©   - Feedback  - 隱私權政策聲明