【正文】 .......................................................................... 6 研究的意義 ................................................................................................. 7 2．激光脈沖放大過(guò)程中的脈寬和光譜特性 .................................................................. 8 超短脈沖傳輸?shù)幕纠碚撝R(shí) ....................................................................... 8 脈沖寬度和光譜寬度 ........................................................................... 8 光脈沖電場(chǎng)的表示 .............................................................................. 8 光脈沖傳輸?shù)姆匠? .............................................................................. 8 超短脈沖激光在傳輸和放大過(guò)程中的自相位調(diào)制效應(yīng)（ SPM）和群速度色散效應(yīng)（ GVD）對(duì)脈寬和光譜的影響 ................................................................................................ 9 自相位調(diào)制效應(yīng)和群速度色散效應(yīng) ....................................................... 9 與 GVD 在超短脈沖激光在放大過(guò)程中對(duì)脈寬和光譜特性的影響。 其次我要感謝培養(yǎng)我的安慶師范學(xué)院，是安慶師范學(xué)院這片沃土哺育了我饑渴的求知味蕾。是他們的陪伴讓我的青春溫暖并快樂(lè)著。研究超短激光在其傳輸以及放大過(guò)程中由放大器窗鏡引起的自相位調(diào)制效應(yīng)以及群速度色散等非線(xiàn)性效應(yīng)對(duì)激光脈沖的脈寬帶寬及光譜的影響。因此我們可以通過(guò)研究該論題，得出非線(xiàn)性效應(yīng)影響超短脈沖激光在放大過(guò)程中脈寬和光譜特 性的機(jī)制，近而可以得出結(jié)論。同樣，對(duì)光脈沖寬度和光譜寬度可以有不同的定義。在這里我們主要介紹下光脈沖傳輸?shù)姆匠獭? 色散長(zhǎng)度 LD和非線(xiàn)性長(zhǎng)度 LNL。這樣自相位調(diào)制SPM 效應(yīng)引起的新的頻率將會(huì)被群速度色散效應(yīng)彌散。在群速度色散中低階群速度色散起主要作用，但是這并不代表著高階色散就不會(huì)對(duì)脈沖產(chǎn)生影響，高階色散對(duì)超短脈沖脈寬的影響因子與傳輸距離和色散距離有線(xiàn)性變化的關(guān)系。當(dāng)時(shí)，這種振蕩將明顯的減弱。當(dāng) N 1 時(shí)，群速度色散效應(yīng)和自相位調(diào)制效應(yīng)將會(huì)同時(shí)起作用。群速度色散效應(yīng)（ GVD），會(huì)展寬脈寬。啁啾有正負(fù)之分。通過(guò) CPA 核心技術(shù)，這使得建造峰值功率 1PW CPA 的裝置技術(shù)日趨成熟。對(duì)過(guò)實(shí)驗(yàn)研究我們得出結(jié)論。 關(guān)鍵詞： 群速度色散 , 自相位調(diào)制 ,脈寬壓縮 4 / 13 超短脈沖放大過(guò)程中的脈寬和光譜特性 4 Pulse width and spectral characteristics in the process of amplification of ultrashort laser pulse Shu Qingzhen (School of Physics and Electrical Engineering of Anqing Normal College, Anqing 246011) Abstract Pulse,laser has developed into a prosperous front scientific. This paper studies the basic theory of knowledge in the ultrashort pulse transmission and a deeper understanding of some nonlinear effect caused by ultrashort pulse transmission in the mainly to study the selfphase modulation (SPM)and group velocity (GVD)and the effect of the studies these effects on the pulse width and spectral characteristics in the amplication and propagation on some nonlinear effects by experiment,to know how the width of ultrashort pulse broadening and pression in the properties mainly depended on the dispersion length and nonlinear dispersion length and nonlinear length of laser propagation i