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  本文選題：全固態(tài)　切入點：調(diào)Q鎖模　出處：《北京交通大學(xué)》2017年碩士論文

【摘要】：1.3 μm全固態(tài)激光器具有小型化,熱效應(yīng)小,可靠性高,全固化,光束質(zhì)量高等優(yōu)點使其在科學(xué)研究、醫(yī)療、工業(yè)生產(chǎn)和國防建設(shè)等方面起到重要作用;1.34μm調(diào)Q鎖模激光器也已經(jīng)廣泛應(yīng)用于光纖通信、光學(xué)測量、光學(xué)參量振蕩器等。因此備受國內(nèi)激光研究所關(guān)注與重視。但多數(shù)文獻(xiàn)研究主要集中在長腔諧振腔,所得激光重復(fù)頻率較低;而吉赫茲鎖模激光器在高速電光取樣、通信、和光學(xué)時鐘等領(lǐng)域已有廣泛用途,高重復(fù)頻率激光器已成為國際上重要的研究內(nèi)容。因此本論文在考慮了諧振腔模式匹配、晶體的熱透鏡效應(yīng)、穩(wěn)腔條件、晶體特性、飽和吸收體損傷閾值等因素的基礎(chǔ)上,理論優(yōu)化設(shè)計激光諧振腔,最終實現(xiàn)了重復(fù)頻率較高、激光指標(biāo)較好的1.34 μm激光調(diào)Q鎖模脈沖激光器以及相應(yīng)的紅光激光輸出。其主要內(nèi)容為:介紹了全固態(tài)激光器的發(fā)展歷程、優(yōu)勢以及應(yīng)用領(lǐng)域,簡述了 1.3 μm Nd:YVO4、Nd:GdV04激光器的發(fā)展過程;闡述了調(diào)Q與鎖模原理,并在理論上對Nd:YVO4、Nd:GdVO4激光晶體的V:YAG飽和吸收體調(diào)Q鎖模理論進行了推導(dǎo)分析,獲得其能量公式;詳細(xì)介紹了激光工作介質(zhì)性能參數(shù);對飽和吸收體V:YAG進行了介紹和優(yōu)點分析。通過相關(guān)理論優(yōu)化設(shè)計激光腔,利用Nd:YVO4晶體,V:YAG為飽和吸收體,實現(xiàn)了重復(fù)頻率較高的的1.3 μm調(diào)Q鎖模激光輸出;在穩(wěn)態(tài)腔條件下,分別研究了不同腔鏡在不同功率下的重復(fù)頻率、平均功率以及調(diào)Q包絡(luò)脈寬等激光特性,并對實驗結(jié)果進行了分析。實現(xiàn)了結(jié)構(gòu)小型化且高效吉赫茲的1.34 μm Nd:GdVO4/V:YAG調(diào)Q鎖模激光的穩(wěn)定輸出。探討優(yōu)化了激光晶體相關(guān)實驗條件,基于波動機制理論,理論模擬了相應(yīng)單個調(diào)Q包絡(luò)下的鎖模脈沖圖形并進行分析。實現(xiàn)了重復(fù)頻率高達(dá)2 GHz的鎖模脈沖,所得鎖模調(diào)制深度近乎100%。調(diào)Q鎖模激光的最大輸出功率可達(dá)715 mW。此外還運用KTP倍頻晶體進一步實現(xiàn)了 671 nm紅光腔內(nèi)倍頻激光輸出。
[Abstract]:The 1.3 渭 m all-solid-state laser has the advantages of miniaturization, small thermal effect, high reliability, full curing and high beam quality.The 1.34 渭 m Q-switched mode-locked laser has been widely used in optical fiber communication, optical measurement, optical parametric oscillator and so on.As a result, domestic laser research attention and attention.However, most of the literatures focus on the long cavity resonator, and the laser repetition rate is low, while the gigahertz mode-locked laser has been widely used in the fields of high-speed electro-optic sampling, communication, optical clock and so on.High repetition rate laser has become an important research content in the world.Therefore, on the basis of considering the factors of resonator mode matching, thermal lens effect, stable cavity condition, crystal characteristics, damage threshold of saturated absorber and so on, the laser resonator is designed theoretically and the repetition rate is high.A 1.34 渭 m Q-switched mode-locked pulse laser and the corresponding red laser output are obtained.The main contents are as follows: the development history, advantages and application fields of all-solid-state laser are introduced, the development process of 1.3 渭 m ND: YVO4N ND: GdV04 laser is briefly described, and the principle of Q-switching and mode-locking is described.The Q-switched mode-locking theory of V:YAG saturated absorber for ND: YVO4 / ND: GdVO4 laser crystal is deduced and analyzed theoretically, and its energy formula is obtained. The performance parameters of laser medium are introduced in detail, and the advantages and advantages of saturated absorber V:YAG are analyzed.The laser characteristics such as repetition rate, average power and Q-switched envelope pulse width of different mirrors at different power are studied, and the experimental results are analyzed.The stable output of 1.34 渭 m Nd:GdVO4/V:YAG Q-switched mode-locked laser with high efficiency and miniaturization is achieved.Based on the theory of wave mechanism, the mode-locked pulse pattern of a single Q-switched envelope is simulated and analyzed.The mode-locked pulse with repetition rate of up to 2 GHz is realized, and the modulation depth of mode-locking is close to 100.The maximum output power of Q-switched mode-locked laser is 715 MW.In addition, the intracavity frequency-doubling laser output of 671nm red light cavity is further realized by using KTP frequency-doubling crystal.
【學(xué)位授予單位】：北京交通大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TN248

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本文編號：1686363