共查询到20条相似文献,搜索用时 18 毫秒
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Se Jong Baik Kiegon Im Hyung Jong Lee Young Tae Ryu 《Quantum Electronics, IEEE Journal of》2000,36(2):155-157
We have studied a copper vapor laser equipped with unstable resonator optics and an intracavity beam splitter. The magnification of the present resonator configuration is as high as 60, and single transverse mode operation is practically supported in this system. We report on the laser output with near diffraction-limited beam divergence and a new observation of self-mode-locking behavior in the output pulses 相似文献
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Sabotinov O. Minkovski N. Stoykova E. Salimbeni R. 《Quantum Electronics, IEEE Journal of》2005,41(1):66-69
We propose a fast effective intracavity technique for optical shuttering and wavelength selection in copper vapor lasers and copper bromide lasers by inserting a polychromatic acoustooptic modulator in a low-intensity section of a classical negative branch unstable resonator. Single-pulse or multiple-pulse operation in one- or two-wavelength emission was achieved in a CuBr laser system. The spatial distributions of the output laser beam as recorded by a CCD camera showed neither power losses nor worsening of the beam quality in comparison with the classical scheme without the modulator. The laser output was characterized with a high degree of linear polarization. 相似文献
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用矩阵光学理论计算了由主振荡器和功率放大器组成的种子注入光腔。主振荡器光腔是由曲率半径R1=-250mm,R2=5000mm,相距L=2375mm的球面镜组成的正支非稳腔;功率非稳腔是由曲率半径R3=400mm,R4=5600mm,相距S=3000mm的球面镜构成的负支非稳腔。理论计算表明,该种子注入光腔可输出光束发散角约几十微弧的激光,可满足铜蒸气激光器主振荡器功率放大器(MOPA)的技术要求。 相似文献
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A 100 W copper “HyBrID” laser (CuHBr laser) fitted with an unstable cavity is examined in the far field and compared with a conventional copper vapor laser of similar beam dimensions. In the far field the divergence is about 100 μradians for the HyBrID laser. The copper vapor laser produces a slightly larger central divergence with significant high divergent structure. This is explained to be due to pulse shape and differences in radial variations of the gain onset timing of the two types of laser, improved beam quality is important for efficient pumping of titanium sapphire lasers and micromachining 相似文献
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激光二极管抽运的主振荡级与功率放大器结构Nd∶YVO4激光器 总被引:1,自引:0,他引:1
为了实现固体激光器高功率、高光束质量的输出,设计了一种激光二极管(LD)阵列抽运的主振荡级与功率放大器(MOPA)结构的Nd∶YVO4激光器。该激光器的振荡级采用平-平谐振腔结构,并使用棱镜组对激光二极管阵列的抽运光整形,消除了激光二极管阵列抽运光不对称对振荡器输出光束质量的影响,在连续工作条件下获得了6.1 W的激光输出,其光束质量M2因子为M2x=1.14,M2y=1.13,光-光转换效率为25.6%。放大级采用具有近共焦、非稳腔特点的折叠光路结构,使振荡级激光光束10次通过放大级晶体,并且有效地抑制了放大自发辐射(ASE)和寄生振荡。在振荡级以6.1 W注入放大器时,得到最大输出功率26.8 W,此时放大器提取效率为29.1%,输出光束质量M2因子为M2x=2.08,M2y=1.92。 相似文献
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High power efficient dye amplifier pumped by copper vapor lasers 总被引:3,自引:0,他引:3
An extensive study has been performed on a dye amplifier pumped by copper vapor lasers. The amplifier utilizes a transverse pumping configuration in which the dye flow, pump beam, and dye extraction beam are mutually orthogonal. The operating characteristics of the amplifier have been studied using four dye-solvent systems which span the wavelength range continuously from 560 to 690 nm. Optimum conversion efficiencies of 18-30 percent at output powers of 0.41-0.76 W have been measured from the four dyes at a 6 kHz pulse repetition rate. The efficiencies and output powers were limited only by the available copper laser pump power. Analytic expressions have been obtained for the amplifier power gain and efficiency using a rate equation treatment of the system dynamics. Excellent agreement is obtained between the predicted and measured amplifier gain characteristics for rhodamine 6G. 相似文献
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By using three 6-disk amplifiers of 10 cm clear aperture from the Nova laser as the active element in an unstable resonator of magnification M=3, we achieved a single shot output of 1.4 kJ in a beam which contains 90% of its energy within twice the theoretical beam divergence. We show that most of the beam quality degradation comes from about one wave of beam tilt during the pulse and that the tilt corrected beam quality corresponds to a Strehl ratio of ≈0.6 相似文献
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由于光泵浦热效应,高功率固体激光器的输出参数如光束远场发散角、输出功率等会发生变化。本文使用g-参数等价腔详细研究了各种类型稳定腔、临界腔的动态工作特性,例如g-参数图上工作点的运动规律、临界光焦度、临界g参数以及光斑半径、远场发散角等。文中还对理论的实验验证和应用进行了讨论。 相似文献
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The authors have generated over 460-mW output power at 255.1 and 271.2 nm with a wall-plug efficiency of 0.016% and 300 mW at 289.1 nm with a wall-plug efficiency of 0.0008%. Using an off-axis unstable resonator matched to the plasma-tube geometry and gain characteristics along with focusing lenses with reduced achromatic and spherical aberration has allowed the highest efficiencies for nonlinear UV generation from a CVL (copper vapor laser) reported to date. Current UV output powers are limited by crystal damage which may be reduced by modifying the delivery optics 相似文献
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掺杂稀土光纤激光器与激光放大器(续篇) 总被引:2,自引:0,他引:2
(1)美国贝尔做出的光纤放大器实验。掺铒光纤,芯径:5μm,数值孔径:0.18,掺杂:1.8×10~(18)铒离子/cm~3,泵光吸收为2.5dB/m,信光吸收为4dB/m,输入光信号为15μW(1.53μm),泵光功率为20、55、100mW(0.52μm)。由此得到的室温下增益为22dB。20mW泵浦时最佳长度为7.5m(增益为10dB)。图14是得到的主要测量曲线,从中不难看出,在高功率泵浦时,增益将出现饱和。 相似文献
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从铜蒸气激光器的特点出发, 扼要概述在设计具有光电控制的振荡放大链工作中所需注意的若干问题, 包括振荡源的选择、空间滤波、放大器的延时与同步控制、热透镜的影响与补偿以及偏振问题等。 相似文献
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Bhowmik A. Cover R.A. Kennedy P.K. Bitterly S. Labbe R.H. 《Quantum Electronics, IEEE Journal of》1988,24(5):802-811
Grazing incidence, ring resonators have been proposed for high-grain free-electron lasers to alleviate the problem of inordinately high irradiance on intracavity optics. Such resonators are also relatively compact, and consequently, their alignment tolerances are more manageable. A geometric design algorithm and detailed computer analysis of a high-gain free-electron ring laser with hyperboloid-paraboloid grazing incidence telescopes is presented. A 3-D wave optics computer code is used to determine the loaded-cavity transverse-mode characteristics of the high-gain unstable ring and to examine the issue of transverse-mode control as a function of the key resonator parameters. Perturbation sensitivity of the individual elements is also determined and compared to that of a corresponding long stable resonator 相似文献
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