本文選題：諧振腔 + 模式�。� 參考：《西安工業(yè)大學(xué)》2015年碩士論文

【摘要】：光學(xué)諧振腔是激光器的組成部分之一,合理的諧振腔結(jié)構(gòu)設(shè)計(jì),可以改變激光器輸出光束的特性。低損耗是評(píng)價(jià)諧振腔結(jié)構(gòu)設(shè)計(jì)優(yōu)良的標(biāo)準(zhǔn)之一,而損耗的大小與諧振腔中的光場(chǎng)模式是相關(guān)的,因此,本文通過分析諧振腔中的光場(chǎng)模式來獲得諧振腔的損耗,從而為諧振腔結(jié)構(gòu)的改善提供理論依據(jù)。本文在諧振腔損耗測(cè)量系統(tǒng)的基礎(chǔ)上,深入研究了外光路與內(nèi)光路的光斑匹配以及諧振腔內(nèi)的模式分布。在光斑匹配中,分析了不同曲率半徑的球面鏡、不同位置時(shí)球面鏡所引起的象散問題,給出了如何消除象散的方法；對(duì)于諧振腔內(nèi)的模式的研究,本文首先分析了直型諧振腔,利用MATLAB軟件,通過仿真得到了諧振腔內(nèi)優(yōu)先起振模式的三維分布圖,計(jì)算了各階模式的光斑半徑值、相移值、損耗值、模式數(shù)目等；通過改變諧振腔的結(jié)構(gòu),分析了腔長(zhǎng)、球面鏡尺寸、球面鏡曲率半徑對(duì)腔內(nèi)模式的影響,研究顯示三者對(duì)腔內(nèi)模式分布均會(huì)產(chǎn)生影響,但腔長(zhǎng)和球面鏡尺寸對(duì)模式的影響更加顯著；在此基礎(chǔ)上分析了帶有光闌的直型腔,通過改變光闌尺寸的大小、位置,發(fā)現(xiàn)諧振腔中的損耗值、光斑半徑值及模式數(shù)目均被影響,并與直型諧振腔進(jìn)行了對(duì)比,結(jié)果顯示加入光闌后,諧振腔內(nèi)的高階模式被抑制了,有效減少了腔內(nèi)的模式；其次,利用等價(jià)的方法將環(huán)形腔結(jié)構(gòu)等價(jià)為直型腔結(jié)構(gòu),研究了環(huán)形腔內(nèi)的模式。最后,利用Matlab軟件,設(shè)計(jì)了完整的程序,設(shè)計(jì)的界面程序使操作和仿真結(jié)果顯示直觀方便。研究結(jié)果表明,選取合適的球面鏡參數(shù)及球面鏡的位置,可以降低光學(xué)元件所引起的象散；為了使腔內(nèi)有較少的模式,加入光闌可以起到抑制高階模式的作用；對(duì)于結(jié)構(gòu)較為復(fù)雜的環(huán)形腔模式研究可以采用等價(jià)的方法。
[Abstract]:Optical resonator is one of the components of laser. Reasonable design of resonator structure can change the characteristics of laser output beam. Low loss is one of the best criteria for evaluating the structural design of resonator, and the loss is related to the mode of light field in resonator. Therefore, the loss of resonator is obtained by analyzing the mode of light field in resonator. Thus, the theoretical basis for the improvement of the resonator structure is provided. On the basis of the resonant cavity loss measurement system, the spot matching between the external and inner optical paths and the mode distribution in the resonator are studied in this paper. In spot matching, the astigmatic problem caused by spherical mirror with different curvature radius and different position is analyzed, and the method of eliminating astigmatism is given. By using MATLAB software, the three-dimensional distribution diagram of the priority starting mode in resonator is obtained by simulation, and the radius value of light spot, phase shift value, loss value, number of modes of each order mode are calculated, and the cavity length is analyzed by changing the structure of resonator. The influence of spherical mirror size and radius of curvature of spherical mirror on the mode of cavity is studied. The results show that all of them have an effect on the mode distribution, but the length of cavity and the size of spherical mirror have more significant influence on the mode. By changing the size and position of the diaphragm, it is found that the loss value, the radius of the spot and the number of modes are all affected in the resonator, and compared with the straight resonator. The results show that the higher-order mode in the resonator is suppressed after the aperture is added, which effectively reduces the mode in the cavity. Secondly, the structure of the ring cavity is equivalent to the structure of the straight cavity by the equivalent method, and the mode in the ring cavity is studied. Finally, a complete program is designed by using Matlab software, and the interface program is designed to make the operation and simulation results display intuitively and conveniently. The results show that the astigmatism caused by optical elements can be reduced by choosing proper spherical mirror parameters and the position of the spherical mirror, and in order to make the cavity have fewer modes, the aperture can restrain the higher-order mode. The equivalent method can be used to study the ring cavity model with complicated structure.
【學(xué)位授予單位】：西安工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN248

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 熊小華;刀口法測(cè)量高斯光束腰斑大小實(shí)驗(yàn)設(shè)計(jì)[J];南昌航空工業(yè)學(xué)院學(xué)報(bào);2000年03期

2 范滇元;王照明;朱愛兵;高臍媛;;包含光闌的激光諧振腔模式[J];中國激光;1985年02期

3 杜燕貽;用增益介質(zhì)多層分布法模擬非穩(wěn)腔光束特性[J];強(qiáng)激光與粒子束;2000年04期

4 劉澤金,陸啟生,李文煜,舒柏宏,趙伊君;含有相位孔徑光闌諧振腔的模式及傳輸特性的數(shù)值分析[J];應(yīng)用激光;1997年01期

相關(guān)碩士學(xué)位論文 前4條

1 葛衛(wèi)國;激光束通過含光闌光學(xué)系統(tǒng)的傳輸變換[D];江西師范大學(xué);2006年

2 宿美春;激光陀螺諧振腔損耗測(cè)量[D];西安電子科技大學(xué);2009年

3 徐銀新;激光諧振腔模式研究[D];西安電子科技大學(xué);2010年

4 齊恩宇;傳導(dǎo)冷卻端面泵浦板條式激光器諧振腔技術(shù)研究[D];國防科學(xué)技術(shù)大學(xué);2009年

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