An Unbiased View of KGW Crystal
An Unbiased View of KGW Crystal
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Figure eight Intra-cavity pulse amplification approach monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to the mirror destruction limitation.
The purple-shifted Section of the SC is of useful importance, specifically for what worries the general performance of broadly tunable optical parametric amplifiers pumped by the fundamental harmonics of Yb lasers. The shortage of seed photons in the extended-wavelength area of the SC spectrum boundaries the amplification performance and brings about pulse-to-pulse Electricity fluctuations throughout the degeneracy area in the optical parametric amplifier. This facet is quantified in Fig. 6a by plotting the SC spectra regarding spectral Power density, which was believed by measuring the energy of your axial Component of SC radiation (and that is the sole pretty much helpful Element of SC emission). KGW crystal makes the very best spectral Vitality density in the 1200�?450 nm array, as noted in a current study30.
Its pump laser needs a short pulse duration, a low time jitter, and sleek temporal and spatial distributions due to the intrinsic instantaneous procedure. As a result, the OPCPA process is more complicated and high priced.
The calculated Lower-off wavelengths for the shorter-wavelength aspect are in step with the general craze of blue-shifted spectral broadening to the bandgap of nonlinear material. Each of the nonlinear products developed sensible crimson-shifted spectral broadenings below situations of optimum pump pulse energies, with the most important red-shift exceeding 2000 nm calculated in GGG crystal. Our final results exposed that GGG and BGO (which also experienced the lowest supercontinuum technology threshold) offer strong, optical damage-free efficiency in a laser repetition fee of two hundred kHz, suggesting that these supplies are good options to YAG and KGW for lower threshold, significant ordinary electrical power supercontinuum era while in the in the vicinity of- and shorter-wave infrared spectral ranges. We also shown that scintillating Houses of bulk products could be quickly studied from the filamentation routine, by using multiphoton excitation using in close proximity to-infrared femtosecond laser pulses.
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While BGO and LT generated the narrowest SC spectra (marginally less than 1.five optical octaves), they may be seen as very attractive nonlinear materials for broadband SC era with pumping at more time laser wavelengths. Owing to its huge nonlinearity, BGO exhibited the lowest SC generation threshold (seventy eight nJ) among the investigated resources, which is 25 % decrease than in KGW and will be considered as great nonlinear material for really very low-threshold SC generation. The observed stable and durable hurt-cost-free performance of BGO and GGG at two hundred kHz pulse repetition rate indicates that these nonlinear products have a possible for SC generation at even larger, MHz, repetition premiums. In addition, these elements deliver SC radiation with a wonderful list of parameters which have been important for purposes in substantial pace spectroscopy and imaging that hire bulk-generated SC, see e.g.17,eighteen,19,twenty.
The crimson-shifted Component of the SC spectrum in BGO has the bottom spectral energy density, that is 1–two orders of magnitude reduce than in the rest of the components. On the other hand, very reduced Power threshold of SC generation, in addition to lower ideal pump Vitality in BGO, must be identified. The approximated spectral Strength densities made in LSO and LYSO are really similar to YAG through the major A part of the SC spectrum. Essentially the most fascinating obtaining in that regard is GGG crystal, which, Regardless of incredibly average blue-shifted spectral broadening, creates the biggest spectral pink-shift and the best spectral energy density inside the 1600�?000 nm vary, which is almost an order of magnitude larger than that generated in YAG.
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 Using the crystals put in exactly the same orientation, while the pink line is underneath the configuration of crystals positioned in orthogonal orientation.
Determine eight Intra-cavity pulse amplification process monitored by an oscilloscope. The pulse underwent an unsaturated amplification due to the mirror injury limitation.
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