The best Side of KGW Crystal
The best Side of KGW Crystal
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Figure eight Intra-cavity pulse amplification method monitored by an oscilloscope. The heart beat underwent an unsaturated amplification due to the mirror problems limitation.
Along with its use being a Raman crystal, KGW can also be Utilized in other optical apps, for instance in laser programs and as a scintillator in clinical imaging.
-switched method. The bandwidth during the orthogonal orientation was clearly Substantially broader. The calculated Fourier rework restricted pulse duration was as quick as sub-160 fs. Under the configuration exactly where The 2 crystals ended up positioned in exactly the same orientation, While using the seed enter, the amplified pulse bandwidth was only three nm with 180 μJ Strength when it broke the dichroic mirrors.
For tungstates, the ytterbium doping concentration can be quite high with no important quenching as the changed ions have an extremely equivalent ion radius, and the inter-ion distance is relatively big.
Down the road, We'll undertake a laser seed by using a broader spectral bandwidth and apply an acousto-optical programmable dispersive filter to modulate the seed’s spectrum for making complete use of your achieve bandwidth of our regenerative amplifier.
Eventually, we investigated the lengthy-term performances of SC technology in crystal samples underneath best pumping problems at increased laser repetition fees. In doing so, the crystal samples were not translated and saved in a very stationary placement with respect to the pump beam in the overall measurement. The examples illustrating sturdy lengthy-term performances of SC technology in KGW and YAG crystals at significant laser repetition charges could be located somewhere else. A lot more specifically, stable performance of KGW crystal at 2 MHz pulse repetition amount below incredibly identical pump beam concentrating geometry was documented recently30, Whilst YAG crystal demonstrated steady performance for numerous hrs at 200 kHz pulse repetition charge In spite of pretty restricted focusing on the pump beam (NA=0.085)32. The extensive-term general performance exams in LSO, LYSO and YSO unveiled gradual narrowing of the SC spectra to the very long-wavelength aspect that transpired soon after a certain publicity time and will be attributed on get more info the optical degradation of these materials. For illustration, in LSO, the onset of spectral narrowing was noticed following (sim 20) minutes at a laser repetition price of ten kHz, though at a laser repetition rate of 20 kHz, secure SC era efficiency was noticed just for about two min.
The spectral measurements of filament-induced luminescence recommend that scintillating properties of elements may be commonly researched using femtosecond in the vicinity of-infrared light-weight resource by way of multiphoton excitation within the filamentation routine, which makes it possible for quick separation of excitation and emission wavelengths and small hazard of optical injury.
The brink Electrical power for SC technology (hbox E _ textrm th ) was described as the pump pulse energy, the place the blue-shifted spectral broadening rapidly settles to a particular cut-off wavelength That continues to be almost frequent In spite of additional maximize in the pump pulse energy. The optimum Electrical power (hbox E _textrm decide ), was outlined since the pump pulse energy, which makes the biggest red-shifted spectral broadening before the onset of periodic modulation within the SC spectrum on account 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）
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Determine four Beam radius variation on The 2 crystals even though transforming the focal size on the thermal lensing result.
]. The dual-crystal configuration lowers the thermal load on Every crystal though keeping a higher attain, and facilitates the compensation of each’s thermal lensing outcome. Thus, the laser cavity can function with a significant balance array more than the thermal lensing result variation.