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Properties of cat mutually pumped phase conjugation and two-wave mixing gain in doped KNSBN 总被引:1,自引:0,他引:1
Cat mutually pumped phase conjugation configuration is discovered and investigated by using two-wave mixing in (KyNa1-y)2z(SrxBa1-x)1-zNb2O6 (KNSBN) crystal. When only one signal or pumped beam does not give birth to phase conjugation, the maximum reflectivity of signal and pumped beam attain 140% and 30% due to two-wave mixing, respectively. The experimental results show that the two-wave mixing can reduce the threshold of incident beams power, extend the incident angle range, and shorten response rate in the process of self-pumped phase conjugator (SPPC) in KNSBN crystal. 相似文献
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BiB_3O_6纳秒光参变振荡器 总被引:2,自引:1,他引:1
采用电光调Q脉冲Nd:YAG固体激光器的532 nm绿光作为抽运光源(10~13 ns,0~20 mJ),以Ⅱ类相位匹配(θ=57.5°Φ=0°)、尺寸为4 mmX 4 mm×12 mm的三硼酸铋晶体(BiB3O6)与一对1215 nm单谐振波长的平镜组成腔长为40 mm的谐振腔,构建了光参变振荡器的整个实验系统.系统将入射抽运光振荡产生1215 nm的信号光及946 nm的闲频光,结果显示,抽运阈值为9 mJ,最高耦合输出为2.57 mJ,抽运脉冲能量与信号脉冲能量的最高转换效率为14.59%. 相似文献
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离子交换高效液相色谱法分析质粒pUDKH 总被引:2,自引:0,他引:2
采用阴离子交换高效液相色谱法监测重组质粒pUDKH的生产过程和该质粒产物中超螺旋pUDKH的比例。所用的色谱条件为:色谱柱TSK gel DNA NPR (4.6 mm i.d.×75 mm);流动相体系由20 mmol/L Tris HCl(pH 8.8 )和1 mol/L NaCl组成,梯度洗脱方式。分析结果表明:质粒产物中超螺旋pUDKH含量达95%(质量分数)以上时,检测不到残留的核糖核酸(RNA)。高效液相色谱法检测质粒pUDKH产物及其生产过程的灵敏度高、试样用量少,分辨率高。 相似文献
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Refractive indices for crystals ammonium dihydrogen phosphate(ADP), 30% deuterated ADP(DADP), 50%DADP, and 70% DADP are measured from 253 to 1529 nm with 5 × 10-6accuracy. Numerical fits to modified double-pole Sellmeier equation are made. Second-harmonic generation, third-harmonic generation phase matching(PM) angles, and noncritical PM(NCPM) wavelengths are calculated using the Sellmeier parameters. The deuterated crystals show smaller PM angles than pure crystal. Fourth-harmonic generation process can be realized by DADP in smaller deuterium content than deuterated potassium dihydrogen phosphate(DKDP).The measured NCPM wavelengths are consistent with the calculated value. PM characteristics are compared between DADP and DKDP. 相似文献
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Owing to the small differences between the cross-sections of the four emission peaks around 1.3 μm, an efficient four-wavelength synchronous launched laser is demonstrated using a Nd:Gd Lu AG crystal. The laser has no special resonator design. The maximum output power is 4.28 W, which corresponds to a conversion efficiency of 45.6%. For the Q-switching, the laser operated in dual-wavelength mode, and the single pulse energy is maintained at ~80 μJ. By calculating the population inversion density, multi-wavelength emission characteristics in both continuous wave and Q-switching lasers are discussed. 相似文献