【正文】 ...................................................................................................5 ............................................................................................................................5 鎖模簡介...................................................................................................................................63 啾脈沖放大技術(shù) ..7 CPA的發(fā)展及現(xiàn)狀 7 CAP放大技術(shù)的原理 7 群速度色散的補償及控制 84 光柵對與棱鏡對的群速度色散 8 光柵對群速度色............................................................................................................8 光柵的色散原理及性能分析......................................................................................8.......................................................................................9.....................................................................................10............................................................................................................................12.....................................................................................12.................................................................................13 棱鏡對的正負(fù)色散....................................................................................................145 OFFNER無象差展寬器群速度色散.........................................................................15........................................................................................................................15........................................................................................................16........................................................................................................................18 Matlab仿真分析............................................................................................................196. 小結(jié)..................................................................................................................................197. 參考文獻.......................................................................................................................208. 致謝................................................................................................................................21 摘 要 超短激光脈沖技術(shù)一直受到各國科學(xué)家的高度重視并取得了迅速發(fā)展．其根本原因是它在科學(xué)研究和頹技術(shù)領(lǐng)域有十分廣泛的用途。飛秒激光技術(shù)的發(fā)展，已使超短激光，脈沖寬度很容易達到幾十fs。利用四棱鏡組補償腔內(nèi)群速彌散的對撞脈沖環(huán)型染料激光器已直接產(chǎn)生了19fs的激光脈沖。飛秒激光脈沖的放大壓縮技術(shù)也獲得驚人的發(fā)展?！?由于CPA技術(shù)的出現(xiàn),激光光強提高到1020W/cm2。該技術(shù)不是將超窄脈沖直接放大,而是先將起其展寬,再放大,最后壓縮。使用CPA技術(shù),不僅能較好地避免非線性效應(yīng),而且可以獲得最大有效能量提取的能量密度?！?本文闡述了飛秒激光技術(shù)的發(fā)展與應(yīng)用，說明了其鎖模原理。并且通過線性追蹤法對啁啾脈沖技術(shù)中幾種典型展寬器的群速度色散進行了推導(dǎo)。給出了解析表達式，與文獻中的一致。并且根據(jù)題目要求設(shè)計了相應(yīng)的OFFNER展寬器?！　　￡P(guān)鍵詞：CPA技術(shù) 展寬器 群速度色散Abstract Ultrashort laser pulse technology has been subject to a high degree of attention from scientists from various countries and has achieved rapid development. The fundamental reason is that it has a very wide range of uses in the field of scientific research and decadent technology. The development of femtosecond laser technology, ultrashort laser pulse width can easily reach tens of fs. Using the fourprism assemblies pensate for intracavity group velocity dispersion on the hit pulse ring dye laser has been directly attributable to a 19fs laser of femtosecond laser pulse pression technology is also an alarming development. CPA technology, the laser light intensity to 1020W/cm2. The technology is not ultra narrow pulse direct amplification, but the first since its broadening, and then enlarge the final pression. CPA technology, not only the better to avoid nonlinear effects, and can get the most effective energy extracted energy paper describes the development and application of femtosecond laser technology, its clamping principle. And by the linear tracing several typical stretcher chirped pulse technology, the group velocity dispersion are derived. Gives the analytical expression, and consistent with the literature. And depending on the subject of design the corresponding OFFNER stretcher. Key Words: chirpedpulseamplification stretcher GVD（group velocity dispersion） 1 引言激光自出現(xiàn)以來一直朝著提高功率、擴展波長范圍、縮短脈沖寬度以及全固態(tài)化、小型化的方向發(fā)展。目前，它己經(jīng)深入到國民經(jīng)濟、國防建設(shè)和人們?nèi)粘Ｉ畹拇蠖鄶?shù)領(lǐng)域，成為人們認(rèn)識世界、改造世界、保衛(wèi)國家、提高生活質(zhì)量的有力工具。超短超強光脈沖的產(chǎn)生，不僅提供了探索自然界奧秘的重要手段，同時也把光與物質(zhì)相互作用帶到了前所未有的領(lǐng)域。近年來，激光科學(xué)技術(shù)中的一個最引人注目的成就是飛秒(lfs=1015s)激光技術(shù)的迅速發(fā)展，現(xiàn)在人們已經(jīng)能夠比較容易地產(chǎn)生脈寬僅有幾個飛秒的激光脈沖。利用克爾效應(yīng)的自鎖模激光器目前可以得到穩(wěn)定的小于10fs的激光脈沖輸出!最近利用叨嗽脈沖激光放大技術(shù)(簡稱CPA)，已經(jīng)得到了被放大后的16fs，20Tw(10‘Zw)的高功率飛秒激光脈沖[s].所謂嘀啾脈沖激光放大，就是將鎖模激光器產(chǎn)生的超短脈沖經(jīng)色散系統(tǒng)展寬至皮秒乃至納秒量級，再經(jīng)過再生放大或多通放大獲取足夠的能量，引起的色差及球差使展寬壓縮系統(tǒng)色散量難以匹配，、偏振器及普克爾盒而產(chǎn)生的附加色散，通過調(diào)節(jié)壓縮器的入射角及色散長度，這一部分的附加色散中的二階及三階色散可以被很好地補償?shù)?，但四階色散就難以補償。這就要求放大介質(zhì)長度越短，脈沖通過放大介質(zhì)的次數(shù)越少越好，，在許多文獻上都有報導(dǎo)，本文針對這幾種展寬器，利用光線追跡法計算了他們的群速度色散量。2超短激光脈沖超短激光脈沖技術(shù)一直受到各國科學(xué)家的高度重視并取得了迅速發(fā)展．其根本原因是它在科學(xué)研究和頹技術(shù)領(lǐng)域有十分廣泛的用途。超短激光脈沖的產(chǎn)生，不僅提供了探索自然界奧秘的重要手段，同時也把光與物質(zhì)相互作用帶到了前所未有的領(lǐng)域。超短激光脈沖應(yīng)用范圍，從超高速半導(dǎo)體器件的測試到材料精密加工。從激發(fā)及追蹤化學(xué)反應(yīng)到復(fù)雜的眼科和神經(jīng)手