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The true secret challenge of ultraviolet coherent light-weight supply generally concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the problems for frequency transformation, so The expansion, dimension, hurt resistance, conversion effectiveness and allowable parameter choice of nonlinear optical crystal are needed more and more.
On the flip side, the beam high-quality of this bigger energy DUV laser would develop into worse on account of extra severe thermal and nonlinear outcomes. For this reason, the frequency conversion procedures should be very carefully meant to mitigate the aforementioned effects. Hence, a significant-ability DUV laser in the FHG of one μm with a very good beam quality could possibly be obtained and may be effective for getting the shorter wavelength DUV lasers for instance 193 nm by SFG.
As a result of thermal lens impact inside the sound-state lasers, If your heating management is inadequate, It's not at all simple to obtain the good-condition laser which has a substantial power and also a higher beam high-quality simultaneously. Not long ago, with the event of the thin disk laser and solitary-crystal fiber (SCF) laser, a higher-electricity laser at the elemental wavelength (1 μm) had been recognized with a very good beam top quality Despite a TEM00 method beam [four,24], which might be great candidates for the basic of your DUV laser era. A different applicant for the basic could be the significant-electrical power fiber laser which might be realized by coherent beam mixture with M2 value lower than 1.
On one other aspect, the power scaling on the NIR laser is an additional part to increase the regular electrical power on the 193-nm DUV laser. Due to the not enough the significant-electrical power amplification Remedy from the NIR laser (for example at 1553 nm), nonlinear frequency processes such as optical parameter oscillation (OPO) might be placed on establish a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative greater ability [21]. A short while ago, a diamond Raman laser showed its capability in attaining a substantial electric power and also a substantial conversion effectiveness on the 1st Stokes from the one-μm laser [22,23], which means the chance to get applied during the 193-nm DUV laser technology because of its high Raman attain and huge frequency shift.
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The pulse length of the 2nd Stokes mild read more was shortened to five ns as revealed in Figure 7a, a single-shot photograph through the oscilloscope, which is a typical phenomenon in Raman laser [forty four] though the heart beat duration in the pump laser was ten ns.
Moreover, combining the reliable-point out laser with other nonlinear procedure for instance stimulated Raman scattering, NIR lasers might be achieved at new wavelengths with large electric power and superior beam quality, which was tested through the evidence-of-theory experiment. This Raman laser plan supplies a whole new route to the large-electrical power DUV laser, Specifically in the wavelength of 193 nm.
Tunable ultraviolet laser supply determined by solid-state dye laser technologies and CsLiB6O10 harmonic generation
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