The smart Trick of KGW Crystal That Nobody is Discussing
The smart Trick of KGW Crystal That Nobody is Discussing
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The obtain bandwidth e.g. of Yb:KGW and Yb:KYW is incredibly huge compared with that of Yb:YAG. This permits for huge wavelength tunability and for Substantially shorter pulse durations from mode-locked lasers. Values well underneath one hundred fs are reached with passive manner locking.
Concurrently, a shorter laser wavelength may be acquired; it is achievable to function with a quantum defect effectively underneath 1%. Being a consequence, the warmth technology is often so little that this partly compensates the decreased thermal conductivity.
-switched manner. The bandwidth in the orthogonal orientation was clearly Significantly broader. The calculated Fourier transform limited pulse length was as short as sub-a hundred and sixty fs. Underneath the configuration wherever the two crystals had been put in the exact same orientation, Using the seed input, the amplified pulse bandwidth was only three nm with one hundred eighty μJ Power when it broke the dichroic mirrors.
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On the other hand, the moment Nd3+:YAG became commercially available, the interest in CaWO4 dropped sharply. In later on decades, specified other tungstate crystals began to catch the attention of a lot of attention.
The blended acquire is intricate and may be measured below diverse pumping situations due to quasi-three-stage system actions from the Yb-doped gain medium. The blueshift, with just one peak from 1037 nm under the very same crystal placement orientation to 1035 nm underneath the orthogonal crystal placement orientation, could outcome with the reabsorption losses at a protracted wavelength inside 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 less than orthogonal orientation.
Thermal consequences are considerably scaled-down in KGW. This combined with the substantial harm threshold make the crystal an outstanding prospect for electricity scaling. Comparing Ba(NO3)two and KGW for Raman application Ba(NO3)two are more effective in case of ns pulses and KGW �?in the event of ps pulses.
Determine 4 Beam radius variation on The 2 crystals whilst shifting the focal size of your thermal lensing result.
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）
Since its discovery in 19701,two, the state from the artwork of supercontinuum (SC) era in bulk good-state components has achieved a significant level of maturity due to tremendous progress of ultrafast laser resources and basic knowledge of the fundamental Bodily processes3,4. The complexity of physical outcomes fundamental SC technology is unveiled inside the framework of femtosecond filamentation, which is a common phenomenon arising from nonlinear propagation of femtosecond laser pulses in clear materials5. In more useful phrases, the attainable spectral extent of SC radiation is determined by the material Attributes, for example linear and nonlinear indexes of refraction and Electrical power bandgap, which along with the laser wavelength define the vital electric power for self-focusing click here (that has for being exceeded for a light-weight filament to form) and clamping intensity of a light-weight filament (and that is proportional towards the get of multiphoton absorption), respectively.
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KGW crystals are utilised as Raman scattering materials simply because they have sturdy Raman scattering at a quantity of different wavelengths. When a laser beam is directed on to the crystal, the photons within the laser beam communicate with the crystal lattice, leading to a few of the photons to scatter in a different direction.