發(fā)布時(shí)間：2019-03-29 20:12

【摘要】：本論文設(shè)計(jì)并搭建了一臺(tái)高重頻端面泵浦主振蕩功率放大器,通過(guò)理論和實(shí)驗(yàn)對(duì)主振蕩功率放大器特性進(jìn)行研究,實(shí)現(xiàn)了50kHz,86.6W的1.06μm近基模輸出。論文首先對(duì)連續(xù)和脈沖下的LD端面泵浦主振蕩功率放大器在連續(xù)和脈沖下進(jìn)行理論推導(dǎo),得出泵浦光斑大小和基模光斑大小的最佳比值,以及1.06μm連續(xù)和脈沖下輸出功率和泵浦功率的關(guān)系;通過(guò)放大功率與提取效率的關(guān)系,得出了高功率種子源激光能夠有效的提高放大器中的提取效效率。基于上述理論,搭建了一臺(tái)LD端面泵浦Nd:YVO4晶體主振蕩功率放大激光器。通過(guò)對(duì)整機(jī)結(jié)構(gòu)設(shè)計(jì),最終得到了27.3W的調(diào)Q基頻光輸出,脈寬19.01ns。經(jīng)過(guò)四級(jí)放大后,實(shí)現(xiàn)了99W的連續(xù)輸出以及86.6W的脈沖激光輸出。通過(guò)增益導(dǎo)引效應(yīng),合理解釋了放大級(jí)光束質(zhì)量先惡化后改善的現(xiàn)象。
[Abstract]:In this paper, a high-repetition-frequency end-pumped main oscillation power amplifier is designed and built. The characteristics of the main oscillation power amplifier are studied theoretically and experimentally, and a 1.06um near-fundamental mode output of 50kHz and 86.6W is realized. Firstly, the theoretical derivation of the LD end-pumped main oscillation power amplifier under continuous and pulse conditions is carried out, and the optimum ratio of pump spot size to fundamental mode spot size is obtained. And the relationship between the output power and pump power of 1.06渭 m continuous and pulse. Through the relationship between the amplification power and the extraction efficiency, it is concluded that the high power seed laser can effectively improve the extraction efficiency in the amplifier. Based on the above-mentioned theory, a LD end-pumped Nd:YVO4 crystal master oscillation power amplifier laser is constructed. A 27.3W Q-switched fundamental frequency optical output with a pulse width of 19.01ns was obtained through the design of the whole machine structure. After four-stage amplification, 99W continuous output and 86.6W pulse laser output are realized. Through the gain guidance effect, the phenomenon that the beam quality of the magnifying stage worsens first and then improves is explained reasonably.
【學(xué)位授予單位】：長(zhǎng)春理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN722.75

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本文編號(hào)：2449851