本文關(guān)鍵詞：釹離子摻雜的倍半氧化物陶瓷激光性能的研究　出處：《深圳大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 釹離子 放電等離子體法 Md:Lu_2O_3陶瓷 損耗

【摘要】：本文主要是針對(duì)放電等離子體法生長(zhǎng)的摻釹三氧化二镥激光陶瓷(Nd:Lu_2O_3 Ceramics)的激光性能開(kāi)展研究。釹屬于稀土元素,釹離子豐富的能級(jí)結(jié)構(gòu)決定了其在1微米波段附近能夠產(chǎn)生不同波長(zhǎng)的躍遷;另一方面,倍半氧化物陶瓷因?yàn)榫哂袩釋?dǎo)率高,密度大,帶隙寬等優(yōu)點(diǎn),成為近年來(lái)固態(tài)激光介質(zhì)研究的熱點(diǎn),Nd~(3+)摻雜的倍半氧化物陶瓷激光具有獨(dú)特的優(yōu)勢(shì),可望為固態(tài)激光的發(fā)展以及性能更加優(yōu)良的激光增益材料的探索提供路徑。激光陶瓷生長(zhǎng)方法多樣,放電等離子體法生長(zhǎng)激光陶瓷具有結(jié)構(gòu)均勻、致密等優(yōu)點(diǎn)。測(cè)試放電等離子體法生長(zhǎng)的Nd:Lu_2O_3陶瓷的熒光譜線,結(jié)果顯示在lum附近有很強(qiáng)的發(fā)射譜線,其中最強(qiáng)的譜線在1078nm和1080nm附近;測(cè)量了Nd:Lu_2O_3陶瓷的吸收譜線,其中在807nm附近處有很強(qiáng)的吸收譜,為選擇合適的泵浦源提供依據(jù)。在實(shí)驗(yàn)中,對(duì)比退火與未退火、鍍膜與未鍍膜Nd:Lu_2O_3陶瓷激光性能,結(jié)果表明退火并且鍍膜的陶瓷激光輸出性能(輸出功率、斜效率等)要明顯優(yōu)于未退火與未鍍膜的陶瓷。最后設(shè)計(jì)了Nd:Lu_2O_3陶瓷V腔激光輸出實(shí)驗(yàn)來(lái)驗(yàn)證高效激光輸出,在~4F_(3/2)到~4I_(11/2)躍遷時(shí),獲得1076.7nm和1080.8nm雙波長(zhǎng),獲得最大輸出功率1.25W,對(duì)應(yīng)的斜效率為38%,在~4F_(3/2)到~4I_(13/2)躍遷時(shí),1357.9nm波長(zhǎng)得到振蕩,獲得最大輸出功率為200mW.測(cè)量了在輸出鏡透過(guò)率分別為T=0.8%,1.6%,3.5%,5%,9%時(shí)的腔內(nèi)往返損耗;在泵浦功率為3W的情況下,確定輸出鏡最優(yōu)的透過(guò)率。我們實(shí)驗(yàn)所取得的結(jié)果,是目前為止已經(jīng)報(bào)道的Nd:Lu_2O_3增益介質(zhì)激光性能中最好的結(jié)果之一,尤其在斜率效率方面,有了成倍的提高。基于振蕩閾值法,我們還對(duì)釹玻璃棒的動(dòng)態(tài)損耗進(jìn)行了測(cè)量。釹玻璃棒作為一種激光增益介質(zhì),是當(dāng)前用于激光核聚變驅(qū)動(dòng)器中唯一一種類型的增益介質(zhì)�；陧�(xiàng)目任務(wù),我們對(duì)兩種類型的釹玻璃棒的動(dòng)態(tài)損耗開(kāi)展了測(cè)試研究。這里的損耗是指泵浦條件下的損耗,不同于沒(méi)有泵浦時(shí)的靜態(tài)損耗。經(jīng)過(guò)對(duì)比測(cè)量發(fā)現(xiàn),所測(cè)試的兩種釹玻璃棒的損耗在0.001-0.004范圍,鑒于樣品的數(shù)量較少,我們的測(cè)試結(jié)果還只能作為初步的依據(jù)。
[Abstract]:In this paper, the laser properties of ND: Lu2O3 Ceramicsgrown by discharge plasma method are studied. Neodymium is a rare earth element. The rich energy level structure of neodymium ion determines the transition of different wavelengths in the region of 1 micron band. On the other hand, because of the advantages of high thermal conductivity, high density and wide band gap, the double semi-oxide ceramics have become a hot spot in the research of solid-state laser medium in recent years. Nd~(3) doped double oxide ceramic laser has unique advantages. It is expected to provide a path for the development of solid-state laser and the exploration of laser gain materials with better performance. Laser ceramics have a variety of growth methods and the structure of laser ceramics grown by discharge plasma method is uniform. The fluorescence spectra of Nd:Lu_2O_3 ceramics grown by discharge plasma method were measured and the results showed that there were strong emission lines near lum. The strongest lines are around 1078nm and 1080nm. The absorption lines of Nd:Lu_2O_3 ceramics have been measured. There are strong absorption spectra near 807nm, which provides the basis for selecting the appropriate pump source. In the experiment, the contrast annealing and unannealed. The laser performance of coated and uncoated Nd:Lu_2O_3 ceramics shows that the laser output performance (output power) of annealed and coated ceramics is obtained. The oblique efficiency is obviously superior to that of the unannealed and uncoated ceramics. Finally, the V-cavity laser output experiment of Nd:Lu_2O_3 ceramics is designed to verify the high efficiency laser output. At the time of transition from 4 FV / 2 to 11 / 2), double wavelengths of 1076.7nm and 1080.8nm were obtained, and the maximum output power was 1.25W. The corresponding oblique efficiency is 38. The wavelength of 1357.9 nm is oscillated at 1357.9 nm during the transition from 4F / 2 to 13 / 2). The maximum output power is 200 MW. The internal and external loss of the output mirror is measured when the transmittance of the output mirror is 0.8 and 1.6 and 3.5 and 5 respectively. When the pump power is 3 W, the optimal transmittance of the output mirror is determined. It is one of the best results of Nd:Lu_2O_3 gain dielectric laser reported so far, especially the slope efficiency has been improved exponentially, based on the oscillation threshold method. The dynamic loss of neodymium glass rod is also measured. As a kind of laser gain medium, neodymium glass rod is the only type of gain medium currently used in laser fusion driver. The dynamic loss of two types of neodymium and glass rod is tested and studied. The loss is different from the static loss under pump condition, and it is found by comparison and measurement. The loss of the two kinds of neodymium and glass rods is in the range of 0.001-0.004. Our results can only be used as a preliminary basis in view of the small number of samples.
【學(xué)位授予單位】：深圳大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN24

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