Facts About KGW Crystal Revealed
Facts About KGW Crystal Revealed
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The thermal conductivity of typical double tungstates is of the order to three–4 W/(K m) �?which is not bad when compared with other laser crystals (Though numerous situations under for YAG), and fairly massive as opposed While using the thermal conductivity of standard glasses.
Figure eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The heart beat underwent an unsaturated amplification due to the mirror destruction limitation.
The red-shifted Section of the SC is of realistic worth, specifically for what worries the effectiveness of broadly tunable optical parametric amplifiers pumped by the elemental harmonics of Yb lasers. The shortage of seed photons inside the lengthy-wavelength location on the SC spectrum boundaries the amplification efficiency and brings about pulse-to-pulse Electricity fluctuations throughout the degeneracy location in the optical parametric amplifier. This component is quantified in Fig. 6a by plotting the SC spectra with regard to spectral Vitality density, which was believed by measuring the Vitality of your axial Portion of SC radiation (and that is the only nearly useful Section of SC emission). KGW crystal provides the very best spectral Strength density in the 1200�?450 nm variety, as pointed out in a current study30.
The monoclinic crystal constructions leads to a pure birefringence, assisting to avoid thermally induced polarization rotation and depolarization reduction.
For tungstates, the ytterbium doping focus can be quite high devoid of substantial quenching since the replaced ions have an incredibly similar ion radius, and also the inter-ion distance is fairly significant.
Another was positioned with its Np -axis parallel with the s-polarized route. A comparison was made amongst a configuration Together with the crystals click here put in a similar orientation (
The black line denotes the configuration with the crystals positioned in the same orientation, though the crimson line is underneath the configuration of crystals positioned in orthogonal orientation.
The particular spectra were being reconstructed by correcting the measured spectra using an account for that filter transmission capabilities and with the sensitivity capabilities of your spectrometers at the info write-up-processing phase. The spectral dynamics in Every single sample was measured by wonderful tuning the pump pulse Electricity with a pc-controlled attenuator that was integrated inside the laser program. Thermal Vitality meter EM (Ophir 3A-PF-12) was used to evaluate the SC Electricity which was thereafter used to calculate the spectral Power density of the SC radiation. All the measurements were executed with no translation from the sample with regard towards the pump beam.
We produced a diode-pumped Yb:KGW regenerative amplifier as being the entrance stop of your kilohertz terawatt laser process. Broad bandwidth pulses were acquired by applying twin crystals with distinct orientations of their optical axes[
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 output spectrum of the regenerative amplifier supports a sub-160 fs pulse amplification. Consequently, pulses with energies of as much as two mJ and length under two hundred fs can be attained applying bigger-high-quality dichroic mirrors and also a broader-spectrum laser seed. This regenerative amplifier will work as a superb pre-amplifier for more laser amplification.
Determine four Beam radius variation on the two crystals even though transforming the focal duration with the thermal lensing influence.
The origin on the element's title comes from the English phrase 'potash,' which means pot ashes, as well as Arabic word qali