KGW Crystal Things To Know Before You Buy
KGW Crystal Things To Know Before You Buy
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Figure 8 Intra-cavity pulse amplification procedure monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to the mirror harm limitation.
The crimson-shifted Element of the SC is of sensible significance, specifically for what concerns the functionality of broadly tunable optical parametric amplifiers pumped by the fundamental harmonics of Yb lasers. The shortage of seed photons during the extended-wavelength area of your SC spectrum boundaries the amplification efficiency and brings about pulse-to-pulse Power fluctuations within the degeneracy region of your optical parametric amplifier. This factor is quantified in Fig. 6a by plotting the SC spectra in terms of spectral Electrical power density, which was believed by measuring the energy of the axial Portion of SC radiation (and that is the only virtually handy part of SC emission). KGW crystal creates the highest spectral Electricity density during the 1200�?450 nm assortment, as famous within a current study30.
The datasets utilised and/or analysed in the course of The present research out there from your corresponding writer on realistic request.
The measured Slash-off wavelengths for the quick-wavelength facet are in keeping with the overall pattern of blue-shifted spectral broadening within the bandgap of nonlinear material. All of the nonlinear materials manufactured affordable pink-shifted spectral broadenings underneath problems of optimal pump pulse energies, with the largest crimson-change exceeding 2000 nm measured in GGG crystal. Our outcomes exposed that GGG and BGO (which also experienced the lowest supercontinuum technology threshold) give long lasting, optical destruction-totally free performance in a laser repetition fee of two hundred kHz, suggesting that these components are great options to YAG and KGW for lower threshold, significant ordinary ability supercontinuum era from the near- and quick-wave infrared spectral ranges. We also demonstrated that scintillating Attributes of bulk materials may very well be commonly examined during the filamentation routine, via multiphoton excitation employing close to-infrared femtosecond laser pulses.
Sooner or later, We are going to undertake a laser seed which has a broader spectral bandwidth and utilize an acousto-optical programmable dispersive filter to modulate the seed’s spectrum to make total use of your attain bandwidth of our regenerative amplifier.
Ultimately, we investigated the extensive-expression performances of SC technology in crystal samples under best pumping problems at higher laser repetition fees. In doing this, the crystal samples were not translated and saved within a stationary situation with respect to the pump beam throughout the complete measurement. The examples illustrating sturdy lengthy-expression performances of SC technology in KGW and YAG crystals at superior laser repetition prices may be identified elsewhere. Additional particularly, steady overall performance of KGW crystal at 2 MHz pulse repetition charge underneath really equivalent pump beam focusing geometry was documented recently30, whereas YAG crystal demonstrated secure general performance for quite a few hrs at 200 kHz pulse repetition amount Despite having pretty limited focusing from the pump beam (NA=0.085)32. The lengthy-term functionality exams in LSO, LYSO and YSO revealed gradual narrowing with the SC spectra about the prolonged-wavelength facet that happened after a specific publicity time and could be attributed towards the optical degradation of such components. As an illustration, in LSO, the onset of spectral narrowing was observed immediately after (sim twenty) minutes at a laser repetition charge of ten kHz, although in a laser repetition fee of twenty kHz, stable SC technology general performance was observed just for roughly 2 min.
The spectral measurements of filament-induced luminescence recommend that scintillating Houses of supplies may be quickly studied applying femtosecond close to-infrared light source via multiphoton excitation while in the filamentation routine, get more info which allows straightforward separation of excitation and emission wavelengths and small hazard of optical harm.
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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 incorporates a quasi-three-stage behavior. The net obtain on the Yb:KGW crystal wasn't superior: a number of tens of roundtrips have been necessary to amplify the nanojoule seed into a millijoule stage. Therefore, the get-narrowing outcome was unavoidable in Yb:KGW regenerative amplifiers.
Figure eight Intra-cavity pulse amplification course of action monitored by an oscilloscope. The heartbeat underwent an unsaturated amplification due to the mirror damage limitation.
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