Fascination About KGW Crystal
Fascination About KGW Crystal
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]. Because of the shorter storage time, Ti:sapphire is usually pumped by frequency-doubled Nd:YAG or Nd:glass reliable-condition lasers, which ends up in a bulky and complicated program with significant Value. In contrast with common CPA laser devices, the OPCPA technique can acquire a shorter pulse duration and a higher peak energy.
The thermal conductivity of typical double tungstates is from the order to three–four W/(K m) �?which is not undesirable compared with other laser crystals (Whilst numerous situations under for YAG), and fairly massive compared with the thermal conductivity of regular glasses.
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The crimson-shifted A part of the SC is of simple relevance, especially for what fears the performance of broadly tunable optical parametric amplifiers pumped by the basic harmonics of Yb lasers. The shortage of seed photons inside the long-wavelength region from the SC spectrum limitations the amplification efficiency and ends in pulse-to-pulse Strength fluctuations across the degeneracy location in the optical parametric amplifier. This aspect is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Strength density, which was believed by measuring the Vitality in the axial A part of SC radiation (which can be the one practically valuable A part of SC emission). KGW crystal creates the very best spectral Vitality density during the 1200�?450 nm selection, as observed inside of a current study30.
In contrast, the seed laser is usually amplified to above one mJ under the orthogonal orientation configuration.
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The put together obtain is elaborate and may be measured under different pumping ailments because of the quasi-three-stage program actions of the Yb-doped gain medium. The blueshift, with a single peak from 1037 nm underneath the exact same crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could end result from the reabsorption losses at an extended wavelength from the crystal where by the laser polarization is parallel to its Nm -axis, making the get at 1035 nm higher than that at 1037 nm below orthogonal orientation.
We system to boost the pulse Electrical power to over forty mJ in two-phase multi-go amplifiers, akin to a achieve component of 20. In Each and every amplifier, we can even undertake two cascaded crystals positioned below orthogonal orientation to decrease the thermal load on Every single crystal and compensate for your get-narrowing effect.
The edge Electrical power for SC technology (hbox E _ textrm th ) was described given that the pump pulse Vitality, where the blue-shifted spectral broadening promptly settles to a specific Minimize-off wavelength that remains almost consistent even with more improve on the pump pulse energy. The optimum Electricity (hbox E _textrm choose ), was described given that the pump pulse Vitality, which more info makes the most important red-shifted spectral broadening prior to the onset of periodic modulation during the SC spectrum because of filament refocusing.
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）
Tungstates are likely to own superior Raman coefficients (�?Raman scattering). Therefore, they're able to deliver substantial Raman obtain at reasonable optical intensities. It is possible to make use of the laser crystal alone being a Raman converter.
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