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用时域ABCD矩阵对调Q锁模激光器的研究 总被引:3,自引:3,他引:0
用时域ABCD矩阵讨论了调Q锁模脉冲激光器输出脉冲的宽度和啁啾特性,主要给出了调Q元件作为幅度调制元件时的时域ABCD矩阵,并将光脉冲在激光腔中往返一周的ABCD矩阵写出,用此矩阵讨论了它对锁模脉冲的影响.给出了Nd:YAG激光器中用Cr4+:YAG作调Q元件时的调Q锁模脉冲激光器特性,并讨论了腔内色散、饱和吸收强度、增益带宽对输出脉冲特性的影响.用时域ABCD矩阵大大简化了计算过程. 相似文献
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全光纤调Q掺铒光纤激光器的脉冲研究 总被引:5,自引:3,他引:2
报道一种全光纤调Q掺铒光纤激光器,在其结构中采用带有光纤光栅的光纤环形镜作为调Q装置此调Q方案同时具有对腔内损耗进行调制和对激光输出波长选择的功能理论上分析了不同臂长差时的脉冲出现情况,与实验基本相符并对激光单脉冲产生及稳定性进行了分析讨论. 相似文献
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本文从理论出发,分析抗共振环(Anti-ResonantRing-ARR)稳定调Q 激光脉冲的作用.将新型调Q晶体Cr4+:YAG置于ARR中心,在平-ARR介稳腔中获得能量起伏0.34%的高稳调Q单脉冲输出. 相似文献
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采用氙灯泵浦新型晶体Nd:Sr5(PO4)3F,以KTP晶体腔内倍频,实现了该晶体0.5295μm绿光激光BDN染料片调Q运转。测量了输出绿光激光的特性及不同腔长和染料片小信号透过率情况下的输出能量及脉冲宽度,给出了染料片调Q腔内倍频的耦合波方程组,数值求解该方程组,所得的理论数据与实验结果较好地相符。 相似文献
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二极管泵浦被动调Q Nd:YAG/ KTP绿光激光器 总被引:1,自引:1,他引:0
报道了LD泵浦的Nd:YAG/KTP/Cr:YAG结构被动调Q绿光激光器.当注入泵浦功率为750mW时,获得了平均功率38mW,脉冲宽度14.7ns,重复频率20.4kHz,峰值功率126.6W的调Q绿激光输出. 相似文献
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Active mode-locking of coumarin dye lasers has been achieved using either a GaAs or GaP picosecond high voltage switch to drive an intra cavity Pockels cell in a Q modulation technique. Pulses of 30–50 ps were generated with a peak power of ≈500 kW, while pulses as short as 20 ps were observed. The method can be generally applied to various laser systems over wide spectral ranges. 相似文献
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REN Zhaoyu ZHUANG Dounan LEI Shizhan YU Guiqiu Zhang Jiyue 《Chinese Journal of Lasers》1995,4(3):199-206
TheExperimentStudyofTwoNd ̄(3+):p-glassRodsLaserwithaQ-switch/mode-lockingandAmplifier¥RENZhaoyu;ZHUANGDounan;LEIShizhan;YUGui... 相似文献
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采用氙灯泵浦晶体Nd:S-VAP,KTP晶体腔内倍频,实现了Nd:S-VAP晶体0.5325μm绿光激光BDN染料片调Q运转,测量了输出绿光激光的特性及不同腔长和染料片小信号透过率情况下的输出能量及脉冲宽度,给出染料片调Q腔内倍频的耦合波方程组,数值求解方程组,所得的理论数据与实验结果很好地相符。 相似文献
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Loubriel G.M. Zutavern F.J. Baca A.G. Hjalmarson H.P. Plut T.A. Helgeson W.D. O'Malley M.W. Ruebush M.H. Brown D.J. 《IEEE transactions on plasma science. IEEE Nuclear and Plasma Sciences Society》1997,25(2):124-130
Optically activated GaAs switches operated in their high-gain mode are being used or tested for pulsed power applications as diverse as low-impedance, high-current firing sets in munitions; high impedance, low-current Pockels cell or Q-switch drivers for lasers; high-voltage drivers for laser diode arrays; high-voltage, high-current, compact accelerators; and pulsers for ground penetrating radar. This paper will describe the properties of high-gain photoconductive semiconductor switches (PCSS), and how they are used in a variety of pulsed power applications. For firing sets, we have switched up to 7 kA in a very compact package. For driving Q switches, the load is the small (30 pF) capacitance of the Q switch which is charged to 6 kV. We have demonstrated that we can modulate a laser beam with a subnanosecond rise time. Using PCSS, we have demonstrated gain switching a series-connected laser diode array, obtaining an optical output with a peak power of 50 kW and a pulse duration of 100 ps. For accelerators, we are using PCSS to switch a 260 kV, 60 kA Blumlein. A pulser suitable for use in ground-penetrating radar has been demonstrated at 100 kV, 1.3 kA. This paper will describe the specific project requirements and switch parameters in all of these applications, and emphasize the switch research and development that is being pursued to address the important issues 相似文献
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采用自再现理论,对一种包含两个半导体光放大器的锁模光纤环形激光器进行了数值研究.研究结果表明:为了提高谐波锁模输出脉冲的质量,调制半导体光放大器应当保持高直流偏置,对自发辐射信号进行调制并提供锁模脉冲克服腔损耗所需的增益,而此时的增益半导体光放大器则被低直流偏置充当增益补偿器维持较窄的净增益窗口;与之相反,为了获得振幅均衡的有理数谐波锁模输出脉冲,调制半导体光放大器则应当偏置在较低的电流上,而增益半导体光放大器应当保持较高的偏置电流以提供足够的常量增益克服腔损耗.此外,还必须提高注入光信号的峰值功率. 相似文献
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微片激光器由于自身的内应力会输出频率分裂的正交偏振的两个模式.研究了回馈对微片激光器频差的影响.研究发现:在回馈的作用下微片激光器的频差大小呈现出以初始频差为中心的类正弦的频差调制,周期为λ/2;频差调制曲线的幅度与回馈水平成正比,但是当回馈水平过强时会出现偏振态跳变,从而使频差消失;在一定的回馈外腔范围内,频差调制曲线的幅度与初始频差亦成正比.并利用复合腔模型和激光器的自洽理论进行了理论分析和模拟,所得结果与实验结果相符.此调制现象在精密测量领域有潜在应用. 相似文献
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Beach RJ Mitchell SC Meissner HE Meissner OR Krupke WF McMahon JM Bennett WJ Shepherd DP 《Optics letters》2001,26(12):881-883
Greater than 12 W of average output power has been generated from a diode-pumped Yb:YAG cladding-pumped planar waveguide laser. The laser radiation developed is linearly polarized and diffraction limited in the guiding dimension. A slope efficiency of 0.5 W/W with a peak optical-optical conversion efficiency of 0.31 W/W is achieved. In a related structure, greater than 8 W of Q -switched average output power has been generated from a Nd:YAG cladding-pumped planar waveguide laser by incorporation of a Cr(4+): YAG passive Q switch monolithically into the waveguide structure. Pulse widths of 3 ns and pulse-repetition frequencies as high as 80 kHz have been demonstrated. A slope efficiency of 0.28 W/W with a peak optical-optical conversion efficiency of 0.21 W/W is achieved. 相似文献