【摘要】：2.1μm波段激光器在激光醫(yī)療、激光雷達、光電對抗等領域都有著廣泛的應用,線寬窄化、功率提高是應用需求驅(qū)使下2.1μm激光器極為重要的發(fā)展方向,具有廣闊的發(fā)展前景。基于MgO:PPLN準相位匹配技術(shù)的光參量振蕩器是獲得2.1μm激光的有效方法,但該方法受變頻簡并點、泵浦光線寬和強抽運下的高增益等影響,輸出的2.1μm激光線寬較寬,針對這一問題,本論文開展了相關理論和實驗研究。理論方面研究了MgO:PPLN晶體調(diào)諧特性,基于MgO:PPLN的2.1μm單諧振光參量振蕩器增益、閾值及轉(zhuǎn)換效率,優(yōu)化設計了1.064μm高重頻泵浦源及光參量振蕩器器件參數(shù)。分析了造成2.1μm激光中心波長漂移及線寬展寬的原因,理論計算了2.1μm激光線寬展寬量,并且在此基礎上,在保證光譜選擇性的前提下,研究了體布拉格光柵器件不同光柵厚度d,光柵的空間頻率f和折率調(diào)制量δn等參數(shù)對線寬窄化的影響。實驗方面MgO:PPLN晶體溫度固定在50.5°C,采用折疊型外腔泵浦結(jié)構(gòu),1064nm泵浦功率為12.9W條件下,自由運轉(zhuǎn)時實現(xiàn)了5.51W的簡并波長2.1μm激光輸出,光譜線寬為109nm,引入VBG光柵器件,獲得2.904W窄線寬2.1μm激光輸出,線寬被有效壓窄至0.17 nm,光-光轉(zhuǎn)換效率達到22.5%。
[Abstract]:2.1 渭 m band lasers have been widely used in the fields of laser medical treatment, lidar, optoelectronic countermeasure and so on. Line width narrowing and power increasing are the most important development directions of 2.1 渭 m laser driven by application demand. It has broad prospects for development. The optical parametric oscillator based on MgO:PPLN quasi-phase matching technique is an effective method to obtain 2.1 渭 m laser. However, this method is affected by the degenerate point of frequency conversion, the width of pumping light and the high gain of strong pump, and the output line width of 2.1 渭 m laser is wider. To solve this problem, this paper carried out theoretical and experimental research. Theoretically, the tuning characteristics of MgO:PPLN crystal are studied. Based on the gain, threshold and conversion efficiency of MgO:PPLN 2.1 渭 m single resonance optical parametric oscillator, the device parameters of 1.064 渭 m high repetition frequency pump source and optical parametric oscillator are optimized. The causes of the center wavelength shift and linewidth broadening of 2.1 渭 m laser are analyzed, and the linewidth broadening amount of 2.1 渭 m laser is calculated theoretically. On the basis of this, the spectral selectivity is guaranteed. The effects of parameters such as space frequency f and fold rate modulation 未 _ n on the width of the grating are studied with different grating thickness of bulk Bragg grating device. The experimental results show that the temperature of MgO:PPLN crystal is fixed at 50.5 擄C, the structure of folded external cavity is adopted, the pump power of 1064nm is 12.9 W, the degenerate wavelength of 5.51 W is 2.1 渭 m, the spectral linewidth is 109 nm, and the output wavelength of 5.51 W is 2.1 渭 m when the pump power of 1064nm is 12.9 W. The VBG grating device is introduced and the 2.904W narrow linewidth 2.1 渭 m laser output is obtained. The linewidth is effectively compressed to 0.17 nm, and the optical-optical conversion efficiency is 22.5%.
【學位授予單位】：長春理工大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN753.91

【參考文獻】

相關期刊論文 前10條

1 郭靖;何廣源;焦中興;王彪;;高效率內(nèi)腔式2μm簡并光學參量振蕩器[J];物理學報;2015年08期

2 鄧華榮;張龍;謝宇宙;李彤;李燕凌;薛亮平;;PPMgLN用于光參量振蕩實現(xiàn)低閾值2μm激光[J];中國激光;2013年07期

3 鄧華榮;李彤;牛瑞華;薛亮平;李燕凌;曹文勇;;PPLN晶體實現(xiàn)2μm激光輸出的理論分析[J];激光技術(shù);2013年01期

4 吳羽;焦中興;何廣源;;近紅外摻鎂周期極化鈮酸鋰光參變振蕩器[J];激光與光電子學進展;2012年06期

5 姜海林;卞進田;聶勁松;孫曉泉;;內(nèi)腔式KTP OPO輸出2.7μm激光實驗研究(英文)[J];電光與控制;2011年01期

6 吳月;翟剛;姚治海;;2μm波段激光器的發(fā)展狀況[J];激光雜志;2008年04期

7 卞進田;秦樹軍;聶勁松;孫曉泉;;4~5μm全固化可調(diào)諧激光實驗研究[J];中國激光;2006年01期

8 顏博霞,姚江宏,陳亞輝,許京軍,張光寅;高摻鎂鈮酸鋰晶體周期極化及倍頻特性研究[J];紅外與毫米波學報;2005年03期

9 李學金,張百鋼,姚建銓,張杰鋒;Infrared OPO temperature tuning based on periodically-poled lithium niobate[J];Chinese Optics Letters;2003年12期

10 劉杰,楊濟民,何京良;LD抽運Nd:YVO_4、Nd:GdVO_4和Nd:YAG激光特性比較[J];激光雜志;2003年05期

相關博士學位論文 前2條

1 朱國利;高重頻Ho:YAG激光器及其泵浦源Tm:YLF激光器的研究[D];哈爾濱工業(yè)大學;2012年

2 劉濤;準相位匹配技術(shù)及其應用研究[D];北京郵電大學;2009年

相關碩士學位論文 前2條

1 殷偉文;1.94μmTm：YAP激光器及其帶內(nèi)泵浦Ho：YLF的實驗研究[D];哈爾濱工業(yè)大學;2011年

2 魏星斌;中紅外PPLN光參量振蕩技術(shù)研究[D];中國工程物理研究院;2010年

，

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