The 2-Minute Rule for KGW Crystal
The 2-Minute Rule for KGW Crystal
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Prior function showed that the twin-crystal configuration can be used to compensate to the thermal lensing outcome[
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In the future, an investigation around the spectral acquire curve of Yb:KGW in the leading amplifier will probably be executed beneath cryogenic temperature evolution from seventy seven K to 300 K. The Doing the job temperature might be controlled to appreciate broader get bandwidth and less shift for the central wavelength of the leading amplifier.
Figure seven demonstrates the calculated dispersion compensation outcome. The compressed pulse length is around 185 fs when the length of enter pulses is one hundred fifty fs. The discrepancy concerning them will likely be appreciably minimized with a longer pulse enter simply because uncompensated substantial-order dispersion issues fewer for more time pulses. This configuration was utilized to clearly show the compressibility of our amplified pulses with the preliminary period of our complete program. Down the road we'd adopt a grating-pair compressor for wonderful payment for prime-order dispersion.
-switched manner. The bandwidth during the orthogonal orientation was Evidently A great deal broader. The calculated Fourier transform confined pulse period was as shorter as sub-one hundred sixty fs. Beneath the configuration in which the two crystals had been put in the exact same orientation, Along with the seed input, the amplified pulse bandwidth was only three nm with one hundred eighty μJ Power when it broke the dichroic mirrors.
For tungstates, the ytterbium doping concentration can be extremely superior without significant quenching as the changed ions have an extremely identical ion radius, along with the inter-ion length is comparatively significant.
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In its elemental type, gadolinium incorporates a silvery-white visual appeal. Gadolinium is often a scarce earth or lanthanide aspect that possesses special Homes useful to specialized programs including semiconductor fabrication and nuclear reactor shielding. It really is utilized for both of those its significant magnetic minute (7.ninety fourμ B) As well as in phosphors and scintillator crystals. When complexed with EDTA ligands, it is applied as an injectable distinction agent for MRIs. The component is named once the Finnish chemist and geologist Johan Gadolin.
Therefore, with an additional improvement within our regenerative amplifier, two mJ compressed pulses could be envisioned, devoid of damaging any part inside of our compressor.
We designed a diode-pumped Yb:KGW regenerative amplifier since the front finish of your kilohertz terawatt laser procedure. Wide bandwidth pulses ended up acquired by applying twin crystals with different orientations of their optical axes[
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 with the art of supercontinuum (SC) technology in bulk sound-point out components has arrived at a large volume of maturity because of large progress of ultrafast laser resources and fundamental comprehension of the fundamental physical processes3,four. The complexity of Actual physical results fundamental SC technology is unveiled inside the framework of femtosecond filamentation, which happens to be a universal phenomenon arising from nonlinear propagation of femtosecond laser pulses in clear materials5. In more practical phrases, the attainable spectral extent of SC radiation depends on the material Attributes, like linear and nonlinear indexes of refraction and Electricity bandgap, which along with the laser wavelength define the essential power for self-concentrating (that has to become exceeded for a light-weight filament to variety) and clamping intensity of a light filament (that's proportional towards the get of multiphoton absorption), respectively.
The scattered photons have a different wavelength and Electrical power when compared to the incident photons, which results in a Raman spectrum.
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