The best Side of KGW Crystal
The best Side of KGW Crystal
Blog Article
Investigating tumor perfusion by hyperpolarized (thirteen) C MRI with comparison to conventional gadolinium contrast-enhanced MRI and pathology in orthotopic human GBM xenografts.
Electronic mail aid Close Electronic mail assistance Your electronic mail handle is going to be utilized to be able to notify you when your remark has long been reviewed because of the moderator and in the event the writer(s) from the posting or maybe the moderator really need to contact you immediately.
For some programs, tungstates supply a combination of many practical Homes. Specifically for passive method locking, ytterbium-doped double tungstates are frequently outstanding to other media with regards to The mixture of large obtain bandwidth, huge cross-sections, and relatively good thermal Houses �?Although in Every particular self-control much better supplies can be found.
Along with its use being a Raman crystal, KGW can be used in other optical apps, such as in laser techniques and to be a scintillator in healthcare imaging.
In distinction, the seed laser may be amplified to about one mJ underneath the orthogonal orientation configuration.
The calculated Minimize-off wavelengths in the short-wavelength facet are in step with the overall development of blue-shifted spectral broadening within the bandgap of nonlinear materials. All the nonlinear elements made reasonable purple-shifted spectral broadenings below disorders of exceptional pump pulse energies, with the biggest crimson-change exceeding 2000 nm calculated in GGG crystal. Our final results disclosed that GGG and BGO (which also experienced the lowest supercontinuum technology threshold) present durable, optical hurt-free effectiveness at a laser repetition level of 200 kHz, suggesting that these elements are superior options to YAG and KGW for lower threshold, significant ordinary electric power supercontinuum technology within the in the vicinity of- and short-wave infrared spectral ranges. We also demonstrated that scintillating properties of bulk materials might be readily researched while in the filamentation regime, by way of multiphoton excitation utilizing in the vicinity of-infrared femtosecond laser pulses.
One other was positioned with its Np -axis parallel With all the s-polarized way. A comparison was created concerning a configuration Along with the crystals positioned in exactly the same orientation (
At last, we investigated the long-term performances of SC technology in crystal samples underneath best pumping problems at increased laser repetition prices. In doing this, the crystal samples weren't translated and held within a stationary place with regard on the pump beam in the course of the total measurement. The examples illustrating robust long-expression performances of SC generation in KGW and YAG crystals at superior laser repetition costs might be uncovered somewhere else. Much more precisely, steady performance of KGW crystal at 2 MHz pulse repetition level below incredibly identical pump beam concentrating geometry was noted recently30, While YAG crystal shown secure overall performance for many several hours at two hundred kHz pulse repetition level In spite of really tight focusing with the pump beam (NA=0.085)32. The long-time period effectiveness assessments in LSO, LYSO and YSO uncovered gradual narrowing of your SC spectra on the lengthy-wavelength side that happened just after a specific publicity time and could be attributed on the optical degradation of those components. As an illustration, in LSO, the onset of spectral narrowing was observed after (sim twenty) minutes at a laser repetition fee of 10 kHz, whilst in a laser repetition fee of 20 kHz, secure SC generation general performance was observed just for about two min.
We prepare to boost the heart beat Electricity to earlier mentioned 40 mJ in two-phase multi-move amplifiers, corresponding to a attain issue of 20. In Just about every amplifier, we will even undertake two cascaded crystals positioned less than orthogonal orientation to decrease the thermal load on Every crystal and compensate for that acquire-narrowing impact.
The two-pump laser could offer up to 120 W electricity. Roughly sixty% of the most pump energy was used in our experiment contemplating the small general performance of the dichroic mirrors. Underneath this dual-crystal configuration, our cavity supports a a hundred W pump energy enter, as mentioned in Section 2.2. Large-high quality dichroic mirrors will probably be made use of Sooner or later, and laser pulses will be stretched to an extended pulse duration.
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）
Tungstates are inclined to obtain higher Raman coefficients (�?Raman scattering). As a result, they might generate important Raman get at average optical intensities. It is achievable to make use of the laser crystal by itself being a click here Raman converter.
Springer Mother nature or its licensor (e.g. a society or other associate) retains exclusive rights to this text under a publishing agreement with the author(s) or other rightsholder(s); writer self-archiving of your accepted manuscript Edition of this post is only ruled because of the conditions of these types of publishing settlement and relevant legislation.
EKSMA Optics works by using cookies to supply you with the ideal shopping practical experience. If you continue on to implement our companies, We are going to presume that you comply with the use of these cookies.