本文選題：超快激光 + 全息記錄�。� 參考：《天津理工大學(xué)》2015年碩士論文

【摘要】：飛秒激光超快數(shù)字全息實(shí)時(shí)探測(cè)是一種超短激光脈沖與數(shù)字全息技術(shù)結(jié)合的新型探測(cè)手段。它在超高分辨時(shí)間、空間探測(cè)中具有突出優(yōu)勢(shì)和廣泛的應(yīng)用前景,利用該技術(shù)可以實(shí)現(xiàn)很多其他技術(shù)難以實(shí)現(xiàn)的目標(biāo),如對(duì)THz電場(chǎng)的三維時(shí)空分布、飛秒激光激發(fā)的超快過(guò)程等進(jìn)行探測(cè)。本課題來(lái)源于國(guó)家自然科學(xué)基金儀器專項(xiàng),項(xiàng)目要求搭建16路超短激光脈沖數(shù)字實(shí)時(shí)探測(cè)儀。本文主要研究飛秒激光超快數(shù)字全息實(shí)時(shí)探測(cè)的若干問(wèn)題,具體做了如下工作:1.脈沖數(shù)字全息探測(cè)系統(tǒng)中物光多脈沖形貌的研究分析了自相關(guān)與互相關(guān)兩種方法在脈沖測(cè)量精度上的差別;采用自相關(guān)法對(duì)飛秒激光雙脈沖進(jìn)行了探測(cè),并且提出了一種基于自相關(guān)法的雙脈沖參數(shù)非線性擬合算法,得到了雙脈沖的脈沖寬度、脈沖間隔和強(qiáng)度比參數(shù)。與互相關(guān)檢測(cè)方法的對(duì)比試驗(yàn),證明了本文提出的方法能夠有效減小多脈沖檢測(cè)中的誤差量。2.脈沖數(shù)字全息探測(cè)系統(tǒng)中一步式調(diào)節(jié)脈沖間隔的共線傳輸子脈沖串的產(chǎn)生研究設(shè)計(jì)了基于薄膜分束鏡和組合式延遲線結(jié)構(gòu)的可大范圍調(diào)節(jié)脈沖間隔的聯(lián)動(dòng)分束方案,減少了光路的調(diào)節(jié)環(huán)節(jié),為實(shí)驗(yàn)設(shè)備的儀器化打下基礎(chǔ)。3.脈沖數(shù)字全息探測(cè)系統(tǒng)中雙沃拉斯頓棱鏡產(chǎn)生四方向參考光子脈沖的研究提出了一種基于沃拉斯頓棱鏡的參考光子脈沖分束方案。根據(jù)所提出的方案,搭建了一套雙沃拉斯頓棱鏡分束系統(tǒng),并記錄了相關(guān)的全息圖像。該方案的意義在于簡(jiǎn)化了參考光的整體結(jié)構(gòu),并且在其他領(lǐng)域如激光加工等方面也具有廣泛的應(yīng)用價(jià)值。根據(jù)實(shí)驗(yàn)方案所得到的全息圖的頻譜分布也滿足了超快全息記錄空間角分復(fù)用的要求,為后續(xù)復(fù)用的全息圖像處理提供了支持。本文研究工作產(chǎn)生的創(chuàng)新性成果為:1.提出了采用非線性擬合算法測(cè)量飛秒激光雙脈沖若干參數(shù)的方法。該部分成果發(fā)表在光子學(xué)報(bào)雜志上。2.設(shè)計(jì)了一種一步調(diào)節(jié)脈沖間隔的共線傳輸子脈沖串的方法和裝置。該部分成果已申請(qǐng)了中國(guó)發(fā)明專利“可調(diào)節(jié)脈沖間隔的共光路超短激光脈沖分束方法和分束裝置”,申請(qǐng)?zhí)?201410334680.03.設(shè)計(jì)了一種基于雙沃拉斯頓棱鏡的空間多角度傳輸光束的產(chǎn)生方法和裝置。該部分成果已申請(qǐng)了中國(guó)發(fā)明專利“空間多角度傳輸光束的產(chǎn)生方法和分束裝置”,申請(qǐng)?zhí)?201410334678.3
[Abstract]:Femtosecond laser ultra-fast digital holography is a new detection method combining ultrashort laser pulse with digital holography. It has outstanding advantages and wide application prospects in ultra-high resolution time, space exploration. Using this technology, many other technologies can not achieve the goal, such as the three-dimensional distribution of THz electric field. The ultrafast process of femtosecond laser excitation is detected. This project comes from the National Natural Science Foundation of China. The project requires the establishment of 16-channel ultrashort laser pulse digital real-time detector. In this paper, some problems of femtosecond laser ultra fast digital holographic real time detection are studied, and the following work is done: 1. The study of object Light Multi-pulse Morphology in Pulsed Digital holographic Detection system the difference between autocorrelation and cross-correlation in pulse measurement accuracy is analyzed, and the femtosecond laser double pulses are detected by autocorrelation method. A nonlinear fitting algorithm of double pulse parameters based on autocorrelation method is proposed. The pulse width, pulse interval and intensity ratio parameters are obtained. Compared with the cross-correlation detection method, it is proved that the method proposed in this paper can effectively reduce the error of multi-pulse detection. Study on the generation of collinear transmission sub-trains of one-step regulating pulse interval in pulse digital holographic detection system the scheme of linkage beam splitting based on thin-film beam splitter and combined delay line structure is designed to adjust pulse interval in a large range. It reduces the adjustment of optical circuit and lays the foundation for the instrumentation of experimental equipment. 3. Study on the generation of four-direction reference photon pulses by double Wollaston prism in a pulsed digital holographic detection system a scheme for beam splitting of reference photon pulses based on Wollaston prism is proposed. According to the proposed scheme, a double Wollaston prism beam splitting system is set up and the related holographic images are recorded. The significance of this scheme is that it simplifies the whole structure of reference light and has wide application value in other fields such as laser processing. The spectrum distribution of the hologram obtained according to the experimental scheme also meets the requirements of spatial angular division multiplexing of ultra-fast holographic records and provides support for the subsequent multiplexing of holographic images. The innovative result of the research work in this paper is: 1. 1. A nonlinear fitting algorithm is proposed to measure several parameters of femtosecond laser double pulses. Some of the results are published in the journal Photonics. A one-step method and apparatus for adjusting the pulse interval of collinear transmission sub-pulse train is designed. This part of the achievement has applied for the Chinese invention patent "the common optical path ultrashort laser pulse splitting method and the beam splitting device" which can adjust the pulse interval, the application number is: 201410334680.03. In this paper, a method and apparatus for generating spatial multi-angle beam based on double Wollaston prism is designed. This part of the achievement has already applied for the Chinese invention patent "the generation method and the beam splitting device of the space multi-angle transmission beam", application number: 201410334678.3
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN26;TN249

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