English  |  正體中文  |  简体中文  |  Items with full text/Total items : 75369/75369 (100%)
Visitors : 25582240      Online Users : 432
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/987654321/72914

    Title: 基於發光二極體之超短脈衝雷射即時自相關器;Ultrafast Laser real-time Autocorrelator based on Light Emitting Diode
    Authors: 王勛逸;Wang, Xun-Yi
    Contributors: 光電科學與工程學系
    Keywords: 超短脈衝雷射;自相關;脈衝寬度;脈衝整形
    Date: 2017-01-23
    Issue Date: 2017-05-05 17:16:23 (UTC+8)
    Publisher: 國立中央大學
    Abstract: 本論文利用共線干涉式自相關儀量測超短脈衝雷射的脈衝寬度,利用LED的雙光子吸收效應取代倍頻晶體作為光偵測器來記錄脈衝之自相關訊號;此外使用喇叭的來回低頻震動達成空間延遲,藉此實現可即時在示波器直接觀測之自相關訊號。實驗上亦利用稜鏡對引入已知色散來改變脈衝寬度,藉此驗證自相關儀的準確性。最後,為達成可同時進行脈衝量測與整形之儀器為目的,論文基於利用稜鏡對搭配液晶空間光調制器的架構進行色散補償模擬來達成在已知色散下調變液晶空間光調制器的像素灰階來重現傅立葉轉換極限之脈衝。;In this study, we report a collinear interferometry based autocorrelator for measuring the pulse duration of an ultrashort laser. Based on two photon absorption generated current from the LED, autocorrelated signals can be detected. In order to achieve real-time measurement, we choose a loudspeaker to perform time delay scanning and the interferometric fringes can be observed on the oscilloscope straightaway. To verify the quality of the constructed autocorrelator we use a prism pair with known dispersion to alter the pulse duration, and the induced pulse broadening was in close agreement with the calculation. Finally, to achieve simultaneous pulse measurement and shaping, we simulate the capability of dispersion compensation basing on apparatus of a liquid crystal spatial light modulator in combination of a prism pair. We successfully find the way to allocate the grey level of pixels on the liquid crystal spatial light modulator to counteract the known dispersions that recovers distorted pulses into Fourier transform limited ones.
    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 ©   - 隱私權政策聲明