连续倍频Nd:YAG激光抽运获得微微秒染料激光脉冲

用倍频连续锁模 Nd:YAG 激光器同步抽运若丹明6G 染料激光器,得到了微微秒脉冲。采用温度稳定的铌酸钡钠(Ba_2NaNb_5O_(15))作为 YAG 激光腔外的倍频晶体。脉宽与锁模效率或染料和 YAG 激光腔长匹配以及 Nd:YAG 激光器的振幅稳定性有关。现在同步抽运染料激光器技术的主要优点是特别适于短脉冲放大。     

KTP倍频晶体和可饱和吸收体在激光腔内综合锁模效应的实验研究

本文报道了我们把KTP倍频晶体和五甲川锁模染料溶液同时放在脉冲Nd:YAG激光器腔内进行激光锁模的实验研究情况。结果表明,它们对脉冲Nd:YAG激光器的综合锁模效果明显比它们各自单独锁模时的效果好,文中对它们的综合锁模作用机理进     

脉冲同步泵浦染料激光器及紫外超短脉冲的研究

以主被动锁模Nd~(8+):YAG激光器的倍频输出纵向同步泵浦若丹明染料激光器,获得波长范围5600～6400连续可调谐超短光脉冲,用光克尔法测得5900处脉冲宽度为11ps,峰值功率超过1MW。以ADP晶体腔外倍频染料激光,获得2890～3150连续可调谐紫外超短光脉冲,最高倍频效率达5％     

瞬态同步泵浦锁模腔长负失谐现象的观察

用主被动锁模Nd:YAG倍频脉冲序列作泵浦源,研究了仅有十二次调制的瞬态同步泵浦锁模若丹明激光脉冲的时间特征,着重观察了瞬态同步泵浦锁模染料激光器的腔长负失谐情况,发现腔长负失谐下激光脉冲呈双峰结构,双峰间距和次峰大小均与失谐量成正比。当腔长     

瞬态同步泵浦锁模腔长负失谐现象的观察

用主被动锁模Nd:YAG倍频脉冲序列作泵浦源,研究了仅有十二次调制的瞬态同步泵浦锁模若丹明6G染料激光器的腔长负失谐效应。发现腔长负失谐下激光脉冲呈双峰结构,当腔长至匹配后次峰消失,呈单脉冲。     

弥散补偿飞秒激光器

本文介绍一套CW锁模内腔倍频Nd:YAG激光器同步泵浦弥散补偿飞秒激光系统。该激光系统能够稳定地产生持续期38fs、重复频率200MHz、平均输出功率20mW的光脉冲。本文还讨论了泵浦源的结构。     

一种新型的调Q锁模YAG激光器

本文报导一种新型的采用一个复合功能的声光调制器实现主动锁模和调Q的连续YAG激光器,其输出重复率为10kHz、脉宽约为1μs的调Q脉冲,在每个调Q脉冲内包含有100多个锁模脉冲。总的平均功率为1.5W,倍频输出为0.31W。这一具有较     

石墨烯被动锁模谐波阶数可调的掺铒光纤孤子激光器

采用石墨烯被动锁模的掺Er光纤(EDF)环形腔,获得稳定的谐波阶数可调的孤子脉冲激光。通过调节EDF环形腔中的偏振控制器(PC)改变光腔损耗,实现了锁模谐波从一阶至四阶的可控运转。连续锁模基频重复频率为3.873MHz,中心波长为1 557.6nm,谱线宽度为4.5nm,有明显孤子边带,信噪比(SNR)约为45dB,二、三和四次谐波锁模脉冲重复频率分别为7.745、11.618和15.491MHz。本文的实验结果可用工作于反常色散区锁模激光器的多孤子形成机理来解释。     

凸—ARR非稳腔Nd：YAG／LBO,BBO锁模激光的腔内SHG

根据高效倍频转换对相关参数的要求,选择优良倍频晶体ＬＢＯ和ＢＢＯ作为腔内部频元件,利用凸－ＡＲＲ非稳腔对撞脉冲锁模（ＣＰＭ）Ｎｄ：ＹＡＧ脉冲激光器实现高效倍频转换,倍频能量转换效率分别为６５．３％和４３．６％。     

两种连续波环形染料锁模激光器

分别用“同步泵浦”和“脉冲相撞”方法研制了主动和被动两种CW环形染料锁模激光器。 主动锁模是用声光损耗调制锁模的Ar~ 激光去同步泵浦一个环形染料激光器。在环形腔内,加入双折射滤光片以获得波长可调的超短脉冲序列。 被动锁模是在环形腔的另一束腰位置加上DODCI饱和染料喷流获得的。合适的饱和染料的浓度和喷流厚度,可获得较稳定的亚微微秒脉冲序列。 采用改装的光电倍增管和Tektronix7904(500兆赫)示波器,观察了两种激光器的脉冲序     

可调谐全固化折叠腔单频倍频Nd:YVO4激光器

采用三镜折叠腔,使用KTP晶体进行内腔倍频,在激光谐振腔内插入标准具,利用标准具的选模调谐特性和激光晶体自身的标准具作用,设计并研制了LD抽运连续内腔倍频可调谐Nd:YVO4全固化激光器,实现了稳定的单频绿光输出,抽运功率1.5W时最大单频绿光输出40mW,频率可调谐范围约200GHz.     

一种新型皮秒脉冲激光器

一种新型皮秒脉冲激光器由序列脉冲激光的产生、单脉冲激光的选取、放大和倍频等部分组成,激光器工作物质选用Nd∶YAG晶体,用两个格兰棱镜分别作为起偏器和检偏器,激光器的振荡级利用被动锁模染料产生的锁模序列脉冲激光,经过单脉冲选择器选取出其中的一个单脉冲激光,再经激光器放大部分的放大和倍频晶体的倍频后,激光器最终输出能量为120mJ,脉冲宽度为100ps,波长为532nm的单脉冲激光,其功率约为1.2×109W,功率密度约为4.2×109W/cm2,系统的外触发同步精度优于2μs。     

LD泵浦的Nd∶YAG腔内倍频激光器及其模式

用KTP晶体研制成LD泵浦的YAG腔内倍频激光器,得到0.532μm连续绿色线偏振激光输出,阈值泵浦功率为41mW,输出功率为1.4mW,斜效率为1.7％。研究了泵浦光对倍频激光横模的影响。     

Actively $Q$ -switched and Mode-Locked Diode-Pumped ${hbox {Nd:GdVO}}_{4}{hbox {--KTP}}$ Laser

By using a comparative simple configuration and a short cavity length, a diode-pumped actively Q -switched and mode-locked intracavity frequency doubled Nd:GdVO₄-KTP green laser with the modulation depth 100% was realized, from which the great average output power, the high efficiency were obtained and the mode-locked pulse inside the Q -switched pulse has a repetition rate of 476 MHz. Using the hyperbolic secant function methods and by considering the Gaussian distribution of the intracavity photon density, the influences of continuous pump rate, the upper state lifetime of the active medium and the turnoff time of the acousto-optic Q -switch, we proposed a developed rate equation model for actively Q -switched and mode-locked green lasers. With this developed model, the theoretical calculations are in good agreement with the experimental results and the width of the mode-locked green pulse is estimated to be about 185 ps.     

Stability analysis of an all-fiber coupled cavity Fabry-Perot additive pulse mode-locked laser

The coupled cavity Fabry-Perot additive pulse mode-locked (APM) design of an all-fiber mode-locked fiber laser is investigated theoretically. Experimental implementation of the design has already been demonstrated elsewhere, and in previous work, it was shown that contrary to a solid-state coupled cavity Fabry-Perot APM laser, an interferometric length match and stabilization of the two cavities is not needed. However, the pulse train seems to be located on top of a large CW background. In this paper, a theoretically analysis of the design based on the master equation derived by Haus is presented. Using the analytical theory developed for the master equation it is possible to determine and compare the round-trip loss for a mode-locked and for a CW solution and, hence, find the regimes where an all-fiber laser based on the design is expected to give a stable background free mode-locked output.     

瓦级546.3nm全固态腔内和频激光器

为了获得瓦(W)级546 nm波段的连续激光输出 ,采用高功率激光二极管(LD)端面泵浦Nd:YAG激光晶体,通过谐振腔反射镜膜系的特殊设计,在单通道双共振腔 内获得Nd:YAG激光器的1073.8nm和1112.1nm两条谱线同时运转,并通过在腔内插入非线 性 光学晶体三硼酸锂(LBO)进行腔内和频,获得546.3nm绿光连续输 出。当抽运光功 率为24W时,输出的546.3nm绿光功率高达1.58W,其光-光转换效 率为6.6%。调节LBO 方位角,还可以分别获得1073.8nm和1112.1nm的倍频光537nm和556nm输出。     

Diode-pumped Q-switched Extra-cavity Frequency-doubled Nd: YVO4/KTP Green Laser

A diode-pumped acousto-optical(A-O) Q-switched extra-cavity frequency-doubled Nd: YVO4/KTP (KTiOPO4) green laser formed with a simple plane-plane cavity has been demonstrated. With the incident pump power of 12. 7 W, A-O Q-switched average output power at 1 064 nm was 3.81 W with a duration of 25 ns at a repetition rate of 20 kHz, extra-cavity frequency doubling with KTP as the nonlinear crystal yielded the maximum output power of 1. 92 W at 532 nm, the corresponding optical conversion efficiency from 1 064 nm to 532 nm light is 50.4%. The continuous-wave(CW) laser properties of diodepumped Nd: YVO4 crystal operating at 1 064 nm have been studied. With the incident pump power of 25 W,the maximum CW output power of 13.81 W was obtained with the corresponding optical conversion efficiency of 55.24%.     

Diode-pumped Q-switched Extra-cavity Frequency-doubled Nd：YVO4/KTP Green Laser

A diode-pumped acousto-optical（A-O） Q-switched extra-cavity frequency-doubled Nd：YVO4/KTP （KTiOPO4） green laser formed with a simple plane-plane cavity has been demonstrated. With the incident pump power of 12.7W, A-O Q-switched average output power at 1064nm was 3.81W with a duration of 25 ns at a repetition rate of 20 kHz, extra-cavity frequency doubling with KTP as the nonlinear crystal yielded the maximum output power of 1. 92 W at 532 nm, the corresponding optical conversion efficiency from 1064nm to 532nm light is 50.4%. The continuous-wave（CW） laser properties of diodepumped Nd：YVO4 crystal operating at 1064nm have been studied. With the incident pump power of 25 W, the maximum CW output power of 13.81 W was obtained with the corresponding optical conversion efficiency of 55.24%.     

端面抽运全固态皮秒被动锁模激光器

利用国产半导体可饱和吸收镜(SESAM),设计了不同的腔型结构,实现了平均功率5W单路输出,5W双路输出,输出透过率可调节的半导体可饱和吸收镜线型腔连续锁模(CWML)激光器,双向输出六镜环行腔连续锁模激光器等。将半导体可饱和吸收镜放在腔内的特殊位置,利用一种新的技术方法实现了锁模激光器的频率翻倍。利用由非线性晶体KTP和双色镜构成的非线性镜(NLM),实现了端面抽运Nd∶YVO4激光器的4W锁模输出。     

二极管激光泵浦的微型绿光调QNd:YVO4激光器

介绍了一种高效率腔内倍频及调QNd:YVO4激光器。激光器的Q开关工作是通过一块腔内KTP晶体实现的,该晶体同时用作倍频晶体,实现类相位匹配。连续工作情况下,在泵浦功率800mW时,得到115mW的绿光输出,光-光转换效率为14.4%。调Q工作时,获得脉宽为5.45ns,峰值功率为74W的脉冲绿光,工作频率为100Hz。