The best Side of KGW Crystal
The best Side of KGW Crystal
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In summary, we demonstrated that undoped scintillator crystals: BGO, GGG, YSO, LSO and LYSO are productive nonlinear products for broadband SC generation within the in the vicinity of-infrared and small-wave infrared spectral ranges, when pumped by one hundred eighty fs essential harmonic pulses from an amplified Yb:KGW laser. YSO, LSO and LYSO created two octave-spanning SC spectra, which Examine to SC spectra created in YAG. These materials exhibit rather similar performances to YAG also with regards to threshold and ideal pump pulse energies for SC technology. However, for what issues the likelihood to function at high laser pulse repetition level, YSO, LSO and LYSO present durable operation only at 10 kHz and immediately degrade (inside a couple of minutes) at 20 kHz. Besides the relatively very low SC technology threshold (169 nJ), GGG shown wonderful efficiency features during the short-wave infrared Along with the optimum pump pulse Electrical power of 464 nJ, which can be two situations reduce than in YAG: the most important red-shifted spectral broadening and the highest spectral Vitality density, outperforming KGW and YAG crystals in that element.
-switched manner. The bandwidth while in the orthogonal orientation was Obviously Significantly broader. The calculated Fourier remodel confined pulse period was as shorter as sub-a hundred and sixty fs. get more info Under the configuration exactly where the two crystals were being positioned in the same orientation, While using the seed enter, the amplified pulse bandwidth was only 3 nm with a hundred and eighty μJ Electricity when it broke the dichroic mirrors.
Just before the event of Nd:YAG, Nd3+:CaWO4 was an important exceptional-earth-doped laser obtain medium. It was the truth is Employed in the main repeatedly functioning crystal laser.
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The black line denotes the configuration Along with the crystals put in a similar orientation, while the pink line is underneath the configuration of crystals put in orthogonal orientation.
]. This process was determined by The point that the spectral emission cross-area curves vary from each other when laser polarization is paralleled to the several optical axis of Yb-doped double tungstates[
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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）
Considering the fact that its discovery in 19701,2, the point out on the art of supercontinuum (SC) era in bulk sound-state supplies has achieved a large level of maturity owing to great progress of ultrafast laser sources and essential knowledge of the fundamental physical processes3,4. The complexity of Bodily effects underlying SC technology is unveiled inside the framework of femtosecond filamentation, which is a universal phenomenon arising from nonlinear propagation of femtosecond laser pulses in clear materials5. In more realistic terms, the attainable spectral extent of SC radiation will depend on the material Homes, which include linear and nonlinear indexes of refraction and Vitality bandgap, which along with the laser wavelength determine the vital electric power for self-focusing (which has to get exceeded for a lightweight filament to form) and clamping intensity of a light-weight filament (which is proportional for the buy of multiphoton absorption), respectively.
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KGW crystals are applied as Raman scattering supplies as they have strong Raman scattering at a range of various wavelengths. When a laser beam is directed onto the crystal, the photons from the laser beam connect with the crystal lattice, creating several of the photons to scatter in another direction.