本文選題：半導(dǎo)體激光器 + 光束質(zhì)量��； 參考：《中國(guó)工程物理研究院》2015年碩士論文

【摘要】：高功率、高光束質(zhì)量是半導(dǎo)體激光器作為直接光源應(yīng)用的重要技術(shù)指標(biāo),目前光柵-外腔光譜合束方法是直接半導(dǎo)體激光器(Direct Diode Laser, DDL)獲得高亮度激光輸出的最為有效方法之一,可以實(shí)現(xiàn)數(shù)十KW的高光束質(zhì)量激光輸出。美國(guó)TeraDiode公司利用麻省理 學(xué)院林肯實(shí)驗(yàn)室光譜合束專(zhuān)利技術(shù),將大量獨(dú)立的半導(dǎo)體激光器合成一束高功率、高光束質(zhì)量的激光束,使其達(dá)到現(xiàn)有工業(yè)級(jí)CO2、光纖和固體激光器的功率和光束質(zhì)量水平。這種直接半導(dǎo)體激光器近期內(nèi)將用于紅外對(duì)抗、目標(biāo)指示器、目標(biāo)照射器和工業(yè)加工等領(lǐng)域,在長(zhǎng)期目標(biāo)上,將應(yīng)用于定向能武器,例如路邊炸彈遠(yuǎn)距離清除,反火箭彈、炮彈和迫擊炮彈任務(wù),以及防空任務(wù)等各方面應(yīng)用。由此可以看出：光譜合束技術(shù)將成為半導(dǎo)體激光器光束整形合束方法的革新,使半導(dǎo)體激光器躋身于直接應(yīng)用激光光源行列。本論文工作主要圍繞光柵-外腔反饋光譜合束技術(shù),展開(kāi)高亮度半導(dǎo)體激光器光譜合束光源的研究,完成主要工作如下：1)介紹了提高輸出光功率密度和輸出光束質(zhì)量的非相干合束技術(shù)：光柵-外腔反饋光譜合束技術(shù)近幾年來(lái)的國(guó)內(nèi)外發(fā)展現(xiàn)狀,梳理了半導(dǎo)體激光器外腔光譜合束技術(shù)發(fā)展的若干重要?jiǎng)酉?為下一步的研究工作提供參考指導(dǎo)。同時(shí)就該工作完成了一篇學(xué)術(shù)調(diào)研論文,發(fā)表在《激光與光電子學(xué)進(jìn)展》2015年52卷。2)根據(jù)實(shí)驗(yàn)過(guò)程中遇見(jiàn)的問(wèn)題,提出了光譜互鎖的概念,并就其造成原因做了簡(jiǎn)單的分析和實(shí)驗(yàn)驗(yàn)證,提出了幾種有效的抑制合束單元間光譜互鎖的方法。3)為了滿(mǎn)足激光泵浦需要,設(shè)計(jì)了窄光譜輸出的光譜合束光學(xué)系統(tǒng),獲得了譜寬寬度為3.25nm的激光輸出,獲得的該光譜結(jié)果,國(guó)內(nèi)外尚未出現(xiàn)報(bào)道,該結(jié)果發(fā)表在《中國(guó)激光》2015年42卷。在此基礎(chǔ)上完成了該窄光譜高亮度光源結(jié)構(gòu)的小型化設(shè)計(jì),獲得授權(quán)實(shí)用新型發(fā)明專(zhuān)利1項(xiàng)。4)為了獲得較高合束功率和快慢軸方向上等光束質(zhì)量激光輸出,設(shè)計(jì)了基于透射光柵的3-Bar疊陣光譜合束光學(xué)系統(tǒng),并且首次提出了將平凸柱面鏡作為外腔反饋鏡的結(jié)構(gòu)形式,很好的實(shí)現(xiàn)了光譜互鎖的抑制和光束質(zhì)量的改善。5)提出了分束反饋式的光譜合束結(jié)構(gòu),來(lái)實(shí)現(xiàn)最終合束輸出光束質(zhì)量的改善,并獲得了授權(quán)實(shí)用新型發(fā)明專(zhuān)利1項(xiàng)。
[Abstract]:High power, high beam quality is an important technical index of semiconductor laser as a direct light source. At present, grating and external cavity spectral beam combination method is one of the most effective methods to obtain high brightness laser output by direct Diode Laser, DDL). Dozens of kilowires of high beam quality laser output can be realized. The TeraDiode Company of the United States uses the patented technology of the Lincoln Laboratory of Massachusetts Institute of Science to synthesize a large number of independent semiconductor lasers into a laser beam with high power and high beam quality. It reaches the existing power and beam quality of industrial CO _ 2, fiber and solid-state lasers. This type of direct semiconductor laser will be used in the near future in areas such as infrared countermeasures, target indicators, target irradiators and industrial processes, and in the long term will be used for targeted energy weapons, such as long-range clearance of roadside bombs, anti-rockets, etc. Artillery shells and mortar shells, as well as air-defense tasks and other aspects of the application. It can be seen that the spectral beam bonding technique will become the innovation of laser beam shaping method and make semiconductor laser become one of the direct application of laser light source. In this paper, the research of spectral beam binding of high brightness semiconductor laser is carried out around the grating external cavity feedback spectral beam binding technology. The main work of this paper is as follows: (1) the incoherent beam combination technology to improve the output power density and the output beam quality is introduced: the development of the grating external cavity feedback spectral beam bonding technology in recent years at home and abroad. Some important trends in the development of laser diode external cavity spectroscopic beam bonding technology are reviewed, which provides a reference for the next research work. At the same time, an academic research paper on this work was completed, published in the Progress of Laser and Optoelectronics 2015 (vol. 52. 2) based on the problems encountered in the experiment, the concept of spectral interlocking was proposed. In order to meet the need of laser pumping, a narrow spectral beam coupling optical system is designed, and several effective methods to suppress the spectral interlocking between beam units are proposed in order to meet the needs of laser pumping. The results are as follows: (1) in order to meet the needs of laser pumping, a narrow spectrum output optical system is designed. The laser output with a width of 3.25nm has been obtained, which has not been reported at home and abroad, and published in 42 volumes of China Laser 2015. On this basis, the miniaturization design of the narrow spectrum and high brightness light source structure has been completed. In order to obtain the laser output with high beam matching power and equal beam quality along the fast and slow axis, a patent for a utility model has been granted. The optical system of 3-Bar stacked array spectral beam combination based on transmission grating is designed, and the structure of the flat convex cylindrical mirror as the external cavity feedback mirror is proposed for the first time. The suppression of spectral interlocking and the improvement of beam quality are well realized. (5) A split-beam feedback structure is proposed to improve the output beam quality of the final beam, and a patent for utility model invention is obtained.
【學(xué)位授予單位】：中國(guó)工程物理研究院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：TN248.4

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