The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
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Whilst ytterbium-doped laser gain media generally show a little quantum defect, ytterbium-doped tungstates allow for for significantly small values. For instance, a 1030-nm Yb:YAG laser would Generally be pumped all-around 940 nm, whereas Yb:KGW or Yb:KYW might be most effectively pumped around 981 nm.
We utilised a transmission grating (TG) as being a dispersive part in our stretcher and compressor. A compact configuration was adopted, exactly where the stretcher as well as compressor shared one grating comparable to that in Ref.
At the same time, a shorter laser wavelength is usually received; it can be done to operate with a quantum defect properly beneath 1%. To be a consequence, the heat technology may be so modest this partly compensates the reduce thermal conductivity.
Substitute on the PC for a far better 1 or maybe a wonderful adjustment on the Computer system orientation and the applied higher voltage is required to keep away from this phenomenon. A quick pulse picker may be used to Increase the nanosecond-scale distinction from the output principal pulse.
Amplified pulses using an energy earlier mentioned 2.5 mJ is often expected by making use of the next pump energy on the regenerative amplifier and which makes it do the job in the saturation degree. The laser fluence of ~one J/cm2 over the dichroic mirrors is believed to get below the destruction threshold of substantial-high-quality dielectric-coated mirrors.
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Comparison of spectral Electricity densities of supercontinua generated while in the situations of optimum pumping from the investigated components.
The actual spectra ended up reconstructed by correcting the measured spectra with an account with the filter transmission features and for the sensitivity features in the spectrometers at the info put up-processing stage. The spectral dynamics in Each individual sample was measured by fine tuning the pump pulse Electricity with a computer-managed attenuator which was integrated during the laser program. Thermal Electricity meter EM (Ophir 3A-PF-12) was accustomed to evaluate the SC Electrical power which was thereafter used to compute the spectral energy density from the SC radiation. Every one of the measurements were being performed with no translation on the here sample with regard for the pump beam.
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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 that its discovery in 19701,2, the point out with the art of supercontinuum (SC) technology in bulk reliable-point out supplies has attained a higher amount of maturity owing to large progress of ultrafast laser resources and fundamental understanding of the underlying Bodily processes3,4. The complexity of physical effects underlying SC generation is unveiled while in the framework of femtosecond filamentation, which can be a common phenomenon arising from nonlinear propagation of femtosecond laser pulses in transparent materials5. In additional practical terms, the attainable spectral extent of SC radiation is dependent upon the fabric Houses, such as linear and nonlinear indexes of refraction and Power bandgap, which along with the laser wavelength determine the essential power for self-concentrating (that has for being exceeded for a light-weight filament to variety) and clamping intensity of a lightweight filament (which can be proportional on the purchase of multiphoton absorption), respectively.
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