排序方式: 共有27条查询结果,搜索用时 62 毫秒
11.
We present the design and experimental results for a diode pumped Nd:YLF regenerative amplifier applied to amplify a nanosecond laser pulse. Numerical simulation shows that the maximum output energy and the best stability can be obtained when the regenerative amplifier operates in a saturated mode for all pulse duration and temporal profiles. Using extra post-pulse is a good method to decrease the square-pulse distortion caused by gain saturation effect. The amplifier shows output energy of 4.2mJ with a total energy gain of more than 10^7 and output energy stability of better than 1% rms. When extra post-pulse is added, square-pulse distortion is decreased from 1.33 to 1.17 for the amplifier that is seeded with an optical pulse of 3ns. 相似文献
12.
13.
在理论分析的基础上,提出并实现了利用两个光纤光栅串联结构构成的平坦性较好,特定波 段荧光功率输出较大的超荧光光源,并和光纤反射圈结构和没有反射装置的结构作了比较. 实验利用了1052.54—1053.42nm的反射率为29.6dB和1052.624—1055.60nm的反射率为 34.4dB的两个宽带光纤光栅得到了1052.5—1055.5nm波段的3nm宽的比其他波段要高12dB 的超荧光.
关键词:
串联宽带光纤光栅
超荧光光源
3+光纤')" href="#">掺Yb3+光纤
光纤反射圈 相似文献
14.
15.
反相高效液相色谱法的多波长同时测定预混合饲料中的脂溶性维生素A,α-E,D_3,K_3 总被引:5,自引:0,他引:5
The assay of lipo-soluble-vitamins is considered as a difficult analysis item by all analysts. This paper putsforward a method to simultaneously determine lipo-soluble-vitamins by multiwavelength reversed-phase high performance liquid chromatography,that have not found in references. Under normal conditions samples must bepretreated and then injected separately for each vitamin in analysis. Our method with multiwave length variableprogram and simultaneous determination can assay all lipo-soluble-vitamins on 相似文献
16.
In this letter, we report a multifunctional high-performance Nd:glass laser system. Laser pulses from an all-fiber front end are first amplified by a regenerative amplifier to 10 mJ level, and then further amplified in a four-pass amplifier. The laser system can provide 10.3-J, 3-ns laser pulses at 1053-nm wavelength. The shot-to-shot energy stability is better than 1.5% (RMS). The output laser beam is near diffraction limit. Binary amplitude masks are used to maintain a flat top near-field profile with a 71% fill factor. After the frequency conversion process, 7 and 5.5 J pulses at 526.5 and 351 nm are obtained, respectively. 相似文献
17.
18.
The experimental performance of beam smoothing by combined one-dimensional (1D) spectral dispersion and lens array (LA) technology is presented, as applied in the ninth beam of SG-II. Using 3w spectral dispersion with a bandwidth of 270 GHz and a line dispersion that is 24.9 times the beam's diffraction- limited width decreases the focal spot non-uniformity of 80% energy concentration from 46% to 17%. The multiple-beam interference properties of the LA are theoretically and experimentally validated by spatial power spectral density analysis. Peak-spectra suppression ratios of 20 and 10 dB are achieved in the dispersion and orthogonal directions, respectively. 相似文献
19.
针对波长1053 nm, 0°高反介质膜元件, 采用有限时域差分法, 模拟分析了损伤修复点边缘与法线的夹角对膜层内电场强度分布的影响, 该角度越小, 修复点的损伤阈值越高. 通过优化飞秒激光微加工过程中的焦斑尺寸、脉冲能量、扫描步长和扫描次数等参数, 获得了夹角为25°、深度为14 μm的修复点. 该修复点典型的损伤阈值为21 J/cm2, 是修复前的2.3倍, 50个修复点的测试结果表明该修复参数具有非常好的可重复性. 修复点的测试结果还验证了修复点边缘与法线的夹角大小与其损伤阈值的关系, 45°的电场强度最大值约为25°的2.5倍, 而45°的损伤阈值约为25°的1/2, 模拟和实验结果一致性较好. 同时, 实验验证了微加工的激光脉宽对修复点损伤阈值的影响, 在只改变脉宽的情况下, 脉宽越长, 损伤阈值越低. 相似文献
20.
A special-velocity-matched electro-optic(EO) phase modulator employing a microwave resonant design in lithium niobate is presented.Both the microwave property and phase-modulation performances of the 3.25-GHz modulator agree well with the numerical simulations.Using this modulator in a single-pass configuration with 1-kW microwave drive power,the spectral bandwidth of a 1 053-nm,3-ns pulse-length laser is broadened to 0.13 nm.With a clear aperture of 5×5(mm),the modulator is suited for twodimensional smoothing by spectral dispersion in high power laser systems. 相似文献