KGW Crystal - An Overview
KGW Crystal - An Overview
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]. Mainly because of the limited storage time, Ti:sapphire is typically pumped by frequency-doubled Nd:YAG or Nd:glass good-state lasers, which leads to a bulky and sophisticated system with higher cost. As opposed with regular CPA laser techniques, the OPCPA system can get a shorter pulse duration and a higher peak power.
The thermal conductivity of frequent double tungstates is on the purchase to 3–4 W/(K m) �?which isn't bad in comparison with other laser crystals (While quite a few occasions below for YAG), and quite huge in contrast Together with the thermal conductivity of typical glasses.
For some applications, tungstates present a mix of different practical properties. Particularly for passive manner locking, ytterbium-doped double tungstates are sometimes excellent to other media in terms of The mixture of substantial attain bandwidth, huge cross-sections, and relatively fantastic thermal properties �?even though in Each individual certain self-control better components may very well be found.
Determine 7 reveals the calculated dispersion compensation end result. The compressed pulse period is all over 185 fs once the period of enter pulses is a hundred and fifty fs. The discrepancy among them is going to be considerably decreased with an extended pulse enter because uncompensated significant-purchase dispersion matters a lot less for for a longer time pulses. This configuration was accustomed to demonstrate the compressibility of our amplified pulses on the preliminary stage of our total procedure. In the future we would adopt a grating-pair compressor for high-quality payment for prime-order dispersion.
In distinction, the seed laser can be amplified to around 1 mJ under the orthogonal orientation configuration.
The measured cut-off wavelengths within the shorter-wavelength side are in keeping with the final craze of blue-shifted spectral broadening around the bandgap of nonlinear product. Each of the nonlinear supplies produced acceptable crimson-shifted spectral broadenings under ailments of ideal pump pulse energies, with the most important crimson-shift exceeding 2000 nm calculated in GGG crystal. Our results uncovered that GGG and BGO (which also experienced the lowest supercontinuum generation threshold) offer you durable, optical injury-absolutely free overall performance at a laser repetition amount of two hundred kHz, suggesting that these components are great solutions to YAG and KGW for very low threshold, high common electricity supercontinuum technology in the around- and limited-wave infrared spectral ranges. We also demonstrated that scintillating Houses of bulk products more info could be commonly analyzed from the filamentation routine, by using multiphoton excitation using near-infrared femtosecond laser pulses.
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The combined gain is complex and will be measured below various pumping situations due to the quasi-three-level procedure habits on the Yb-doped obtain medium. The blueshift, with a single peak from 1037 nm under the same crystal placement orientation to 1035 nm underneath the orthogonal crystal placement orientation, could final result within the reabsorption losses at a protracted wavelength while in the crystal in which the laser polarization is parallel to its Nm -axis, creating the achieve at 1035 nm greater than that at 1037 nm less than orthogonal orientation.
The spectral measurements of filament-induced luminescence recommend that scintillating properties of components can be commonly analyzed applying femtosecond near-infrared light source by way of multiphoton excitation inside the filamentation routine, which permits effortless separation of excitation and emission wavelengths and lower risk of optical hurt.
The crimson-shifted Portion of the SC spectrum in BGO has the lowest spectral energy density, which happens to be one–2 orders of magnitude lower than in the remainder of the elements. Even so, quite very low Electrical power threshold of SC technology, together with lower ideal pump Power in BGO, should be identified. The approximated spectral Vitality densities created in LSO and LYSO are quite just like YAG through the entire major Element of the SC spectrum. Quite possibly the most exciting locating in that regard is GGG crystal, which, despite incredibly average blue-shifted spectral broadening, makes the largest spectral purple-change and the very best spectral Electrical power density while in the 1600�?000 nm selection, which is sort of an order of magnitude better than that made in YAG.
相关工作得到了上海扬帆计划、国家重点研发计划、中国科学院战略性先导科技专项、国家自然科学基金项目、上海市优秀学术/技术带头人计划、上海市市级科技重大专项、中国科学院青年创新促进会的支持。（强场激光物理国家重点实验室供稿）
-switched output spectrum in the regenerative amplifier supports a sub-160 fs pulse amplification. Hence, pulses with energies of approximately two mJ and length down below 200 fs can be received utilizing better-high quality dichroic mirrors and also a broader-spectrum laser seed. This regenerative amplifier operates as a very good pre-amplifier for more laser amplification.
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Assembling tungsten oxide hydrate nanocrystal colloids shaped by laser ablation in liquid into rapidly-reaction electrochromic movies.