The Single Best Strategy To Use For KGW Crystal
The Single Best Strategy To Use For KGW Crystal
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Earlier do the job showed that the dual-crystal configuration can be employed to compensate for your thermal lensing influence[
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Besides its use to be a Raman crystal, KGW is also Employed in other optical apps, for example in laser devices and as a scintillator in health-related imaging.
], but it might increase far more Value to this component. The intra-cavity spectral gain curve could possibly be modulated by inserting an etalon that cuts down the actual attain at the wavelength with the most attain component[
For tungstates, the ytterbium doping focus can be very higher with no major quenching since the changed ions have an exceptionally very similar ion radius, plus the inter-ion length is fairly massive.
Many solutions have been adopted to unravel this problem. An acousto-optical programmable dispersive filter may be used to modulate the seed’s spectrum to suppress the acquire-narrowing outcome[
The blended gain is intricate and should be measured less than various pumping circumstances due to the quasi-a few-stage procedure behavior with the Yb-doped acquire medium. The blueshift, with a single peak from 1037 nm under the similar crystal placement orientation to 1035 nm beneath the orthogonal crystal placement orientation, could result from the reabsorption losses at a lengthy wavelength in the crystal where by the laser polarization is parallel to its Nm -axis, building the gain at 1035 nm bigger than that at 1037 nm less than orthogonal orientation.
The actual spectra had been reconstructed by correcting the measured spectra with an account for your filter transmission capabilities and for the sensitivity features from the spectrometers at the info write-up-processing stage. The spectral dynamics in Every single sample was measured by high-quality tuning the pump pulse Vitality with a computer-controlled attenuator which was built-in while in the laser procedure. Thermal Power meter EM (Ophir 3A-PF-12) was used to evaluate the SC energy which was thereafter accustomed to estimate the spectral Strength density in the SC radiation. Each of the measurements were being executed without any translation from the sample with respect for the pump beam.
We developed a diode-pumped Yb:KGW regenerative amplifier because the front end of the kilohertz terawatt laser method. Wide bandwidth pulses were being received by making use of twin crystals with distinctive orientations in 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）
The Yb:KGW laser system includes a quasi-a few-amount behavior. The web get from the Yb:KGW crystal was not significant: several tens of roundtrips had been needed to amplify the nanojoule seed to a millijoule stage. Thus, the obtain-narrowing result was inescapable in Yb:KGW regenerative amplifiers.
Figure eight Intra-cavity pulse amplification method monitored by an oscilloscope. The pulse underwent an unsaturated amplification as a result of mirror damage limitation.
An illustration of such behaviour is demonstrated in Fig. 7a. The character of spectral modifications is highlighted in Fig. 7d, which shows how the SC spectrum around the extended-wavelength aspect shrinks substantially, from 1800 nm to 1450 nm, just after 8 minutes of exposure time within a stationary sample. LT crystal shown somewhat superior long-expression general performance: at pulse repetition charges of as much as one hundred kHz no narrowing on both facet with the SC spectrum was detected. Having said that, immediate narrowing on the SC spectrum in LT crystal was observed right after the read more 1st 5 minutes of Procedure when the heartbeat repetition level was set at 200 kHz (details not shown). In distinction to the above mentioned materials, BGO and GGG shown exceptional SC technology performances with no spectral adjustments at a pulse repetition rate of two hundred kHz, as attested by the point number of SC spectra in BGO and GGG, revealed in Fig. 7b and c, respectively. Determine 7e and file define similar designs of SC spectra at the beginning and at the end of 1 hour-Long lasting measurement in equally components.