KGW Crystal - An Overview
KGW Crystal - An Overview
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The thermal conductivity of popular double tungstates is on the order to three–4 W/(K m) �?which is not bad when compared with other laser crystals (Even though numerous situations under for YAG), and quite big in comparison with the thermal conductivity of regular Eyeglasses.
For some applications, tungstates provide a mix of numerous useful Attributes. Specifically for passive method locking, ytterbium-doped double tungstates tend to be superior to other media with regards to the combination of significant obtain bandwidth, big cross-sections, and comparatively great thermal properties �?While in Every unique self-discipline improved elements could possibly be observed.
As well as its use as being a Raman crystal, KGW can be Utilized in other optical programs, for instance in laser programs and as being a scintillator in clinical imaging.
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The calculated Slash-off wavelengths at the short-wavelength aspect are in line with the general trend of blue-shifted spectral broadening to the bandgap of nonlinear substance. Many of the nonlinear products generated sensible crimson-shifted spectral broadenings below situations of optimum pump pulse energies, with the largest red-shift exceeding 2000 nm measured in GGG crystal. Our success disclosed that GGG and BGO (which also experienced the lowest supercontinuum technology threshold) offer you sturdy, optical harm-cost-free functionality in a laser repetition amount of 200 kHz, suggesting that these elements are fantastic alternatives to YAG and KGW for lower threshold, substantial typical ability supercontinuum generation from the near- and quick-wave infrared spectral ranges. We also shown that scintillating Homes of bulk products could possibly be conveniently examined in get more info the filamentation routine, via multiphoton excitation making use of in the vicinity of-infrared femtosecond laser pulses.
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The spectral measurements of filament-induced luminescence recommend that scintillating Qualities of components could possibly be easily studied working with femtosecond in the vicinity of-infrared light-weight source by way of multiphoton excitation within the filamentation routine, which lets effortless separation of excitation and emission wavelengths and small possibility of optical injury.
The red-shifted A part of the SC spectrum in BGO has the bottom spectral Power density, which happens to be 1–two orders of magnitude reduced than in the remainder of the components. However, quite low Electrical power threshold of SC generation, together with low ideal pump Strength in BGO, should be pointed out. The estimated spectral Vitality densities developed in LSO and LYSO are pretty much like YAG all over the important A part of the SC spectrum. Probably the most exciting obtaining in that regard is GGG crystal, which, Even with quite reasonable blue-shifted spectral broadening, generates the largest spectral crimson-shift and the highest spectral Electrical power density while in the 1600�?000 nm selection, which is almost an order of magnitude larger than that produced 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 output spectrum of your regenerative amplifier supports a sub-a hundred and sixty fs pulse amplification. Therefore, pulses with energies of around 2 mJ and duration below 200 fs may be acquired using higher-quality dichroic mirrors and a broader-spectrum laser seed. This regenerative amplifier works as a very good pre-amplifier for even further laser amplification.
Figure 4 Beam radius variation on The 2 crystals though shifting the focal length of the thermal lensing influence.
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