本文選題：碟片激光器　切入點(diǎn)：晶體吸收效率　出處：《長春理工大學(xué)》2017年碩士論文

【摘要】：經(jīng)過多年的發(fā)展二極管泵浦全固態(tài)激光器(Laser Diode Pumped Solid-State Lasers,LDPSSL),以其優(yōu)異的性能占領(lǐng)著激光器市場巨大的份額,其中,大功率LDPSSL中以碟片激光器和光纖激光器為兩大主要熱點(diǎn)研究方向。碟片激光器具有較小的熱透鏡效應(yīng)、較高的輸出功率、良好的光束質(zhì)量、較高的光-光轉(zhuǎn)換效率和功率可串聯(lián)擴(kuò)展等特點(diǎn),在工業(yè)、國防、醫(yī)療等領(lǐng)域具有重要應(yīng)用前景。課題組現(xiàn)有的24沖程碟片激光器,由于受泵浦光空間分布、多沖程泵浦耦合腔裝調(diào)、晶體受激自發(fā)輻射(Amplified Spontaneous Emission,ASE)抑制等因素的限制,造成無法實(shí)現(xiàn)大功率泵浦光注入,從而導(dǎo)致激光器輸出功率無法提升的問題。針對以上技術(shù)問題,論文開展了24沖程碟片激光器優(yōu)化研究,實(shí)現(xiàn)了大功率連續(xù)激光輸出,可以滿足實(shí)際加工與科研應(yīng)用的需求。基于朗伯-比爾定律,計(jì)算了多沖程下晶體對泵浦光的吸收效率;基于ABCD傳輸矩陣,計(jì)算了碟片晶體上泵浦光斑大小與準(zhǔn)直系統(tǒng)焦距之間的變化規(guī)律;利用勻化棒整形法,對泵浦光進(jìn)行了勻化整形,實(shí)現(xiàn)了碟片晶體上耦合泵浦光斑能量的均勻分布。在此基礎(chǔ)上,研制了24沖程均勻泵浦大功率Yb:YAG碟片激光器。通過實(shí)驗(yàn)測試,對比分析了24沖程碟片激光器優(yōu)化前后的出光性能。驗(yàn)證了優(yōu)化方案的可行性。最終獲得了中心波長為1030nm,功率219.9W的多模連續(xù)激光輸出,光-光轉(zhuǎn)換效率為33.4%,斜效率為40%,這一實(shí)驗(yàn)結(jié)果為今后研制千瓦級單碟片或多碟片串聯(lián)激光器,奠定了理論和實(shí)驗(yàn)基礎(chǔ)。
[Abstract]:After many years of development, laser Diode Pumped Solid-State Lasers-PSS laser has occupied a large share of the laser market with its excellent performance. Among them, the disc laser and fiber laser are the two main hot research directions in high-power LDPSSL.The disc laser has the characteristics of small thermal lens effect, high output power, good beam quality, high optical-optical conversion efficiency, and the power can be extended in series. It has important application prospects in the fields of industry, national defense, medical treatment and so on.Due to the spatial distribution of pump light, the configuration of multi-stroke pump coupling cavity and the suppression of excitated spontaneous emission (Spontaneous), it is impossible to realize high power pump laser injection.As a result, the output power of the laser cannot be raised.Aiming at the above technical problems, the optimization research of 24 stroke disc laser is carried out in this paper, and the output of high power CW laser is realized, which can meet the needs of practical processing and scientific research application.Based on Lambert-Beer 's law, the absorption efficiency of pump light in multi-stroke crystal is calculated, the variation law between pump spot size and collimation system focal length on disk crystal is calculated based on ABCD transfer matrix, and the uniform bar shaping method is used.The uniform distribution of the energy of the coupling pump spot on the disk crystal is realized by the uniform shaping of the pump light.On this basis, a 24-stroke uniformly pumped high power Yb:YAG disc laser has been developed.The light output performance of 24-stroke disc laser before and after optimization is compared and analyzed by experimental test.The feasibility of the optimization scheme is verified.Finally, the multi-mode CW laser with a central wavelength of 1030nm and a power of 219.9W has been obtained. The optical to optical conversion efficiency is 33.4 and the oblique efficiency is 40. The experimental results provide a theoretical and experimental basis for the future development of a kilowatt single-disc or multi-disc series laser.
【學(xué)位授予單位】：長春理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN248

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 王旭;程光華;孫哲;;LD泵浦的被動(dòng)調(diào)QYb:YAG薄片激光器實(shí)驗(yàn)研究[J];光子學(xué)報(bào);2016年03期

2 王春華;王衛(wèi)民;馬毅;石勇;雷軍;;Yb:YAG薄片激光器多通泵浦耦合系統(tǒng)設(shè)計(jì)與實(shí)驗(yàn)[J];強(qiáng)激光與粒子束;2011年05期

3 田玉冰;李顏濤;盧啟鵬;劉星元;;4.81 WYb:YAG/1030nm薄片激光器優(yōu)化設(shè)計(jì)[J];強(qiáng)激光與粒子束;2010年11期

4 李超,徐震,李俊林,吳念樂,李師群,姚廣濤,張紹光;二極管泵浦Yb:YAG Thin Disk激光器獲得16 W連續(xù)激光輸出[J];量子電子學(xué)報(bào);2002年02期

5 李小莉,施翔春,石鵬,郭明秀,張貴芬,陸雨田,胡企銓;Yb∶YAG薄片激光介質(zhì)的溫度效應(yīng)[J];光學(xué)學(xué)報(bào);2001年10期

6 毛艷麗,邱宏偉,徐軍,鄧佩珍,干福熹;高濃度摻釹釔鋁石榴石(Nd∶YAG)晶體的光譜與激光特性[J];光學(xué)學(xué)報(bào);2001年10期

相關(guān)碩士學(xué)位論文 前5條

1 王曉丹;二極管泵浦碟片激光器研究[D];長春理工大學(xué);2015年

2 宋瓊閣;Yb:YAG薄片激光器的理論及實(shí)驗(yàn)研究[D];中國科學(xué)院研究生院（西安光學(xué)精密機(jī)械研究所）;2014年

3 梁成華;碟片激光器冷卻系統(tǒng)的優(yōu)化設(shè)計(jì)與實(shí)驗(yàn)研究[D];華中科技大學(xué);2013年

4 吳興盛;激光二極管直接上能級泵浦Nd:YVO_4薄片激光器研究[D];清華大學(xué);2012年

5 宋祥;高功率碟片激光器諧振腔設(shè)計(jì)及實(shí)驗(yàn)研究[D];華中科技大學(xué);2012年

，

本文編號：1715601