Not known Details About KGW Crystal
Not known Details About KGW Crystal
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Earlier operate confirmed that the twin-crystal configuration can be employed to compensate to the thermal lensing result[
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In its elemental sort, potassium features a silvery gray metallic overall look, but its compounds (such as potassium hydroxide) tend to be more routinely Utilized in industrial and chemical purposes.
The datasets utilised and/or analysed throughout The present examine available with the corresponding author on affordable ask for.
Amplified pulses having an energy over two.five mJ may be predicted by implementing a higher pump power to your regenerative amplifier and making it function with the saturation stage. The laser fluence of ~1 J/cm2 within the dichroic mirrors is considered to be beneath the harm threshold of large-excellent dielectric-coated mirrors.
Even so, after Nd3+:YAG became commercially accessible, the interest in CaWO4 dropped sharply. In afterwards several years, specified other tungstate crystals began to draw in lots of awareness.
Finally, we investigated the extended-time period performances of SC technology in crystal samples beneath optimal pumping circumstances at higher laser repetition charges. In doing so, the crystal samples were not translated and kept in a very stationary place with respect for the pump beam throughout the overall measurement. The examples illustrating strong extended-expression performances of SC era in KGW and YAG crystals at large laser repetition fees may be observed elsewhere. A lot more specially, steady overall performance of KGW crystal at two MHz pulse repetition rate underneath pretty very similar pump beam concentrating geometry was claimed recently30, Whilst YAG crystal shown steady general performance for many hours at 200 kHz pulse repetition rate Despite having quite limited concentrating of the pump beam (NA=0.085)32. The very long-phrase general performance exams in LSO, LYSO and YSO discovered gradual narrowing of the SC spectra around the prolonged-wavelength aspect that happened just after a specific publicity time and could be attributed for the optical degradation of those materials. For example, in LSO, the onset of spectral narrowing was noticed just after (sim 20) minutes in a laser repetition rate of ten kHz, though in a laser repetition fee of 20 kHz, stable SC technology effectiveness was noticed just for roughly two min.
The spectral measurements of filament-induced luminescence recommend that scintillating Attributes of materials might be conveniently researched making use of femtosecond in the vicinity of-infrared mild resource via multiphoton excitation inside the filamentation regime, which will allow uncomplicated separation of excitation and emission wavelengths and lower possibility of optical hurt.
To start with, since the filament-induced luminescence originates from simultaneous absorption of quite a few photons, whose full Electricity exceeds the bandgap Electricity of material, it provides uncomplicated separation of excitation and emission wavelengths and supplies extremely strong sign Even with becoming emitted over all the reliable angle. The place in the filament observe inside the crystal is often effortlessly altered check here inside a ideal way by different the pump pulse Vitality, Whilst the intensity clamping in a light-weight filament greatly lowers the potential risk of optical injury. These options may be handy for getting supplemental information about crystal homogeneity and reveal the presence and distribution of various dopants within the sample.
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）
-switched laser output under the two crystal placement configurations. The black line denotes the configuration With all the crystals put in the same orientation, though the pink line is beneath the configuration of crystals put in orthogonal orientation.
The scattered photons have another wavelength and Strength compared to incident photons, which creates a Raman spectrum.
]. The dual-crystal configuration lowers the thermal load on Every single crystal though sustaining a significant gain, and facilitates the compensation of each one’s thermal lensing outcome. Consequently, the laser cavity can operate with a significant stability assortment about the thermal lensing outcome variation.