CLBO Crystal Secrets
CLBO Crystal Secrets
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In this paper, the new lapping slurry and sharpening slurry are released. As well as deliquescence degree of CLBO is fallen to most affordable. A different working know-how is also adopted. Right after rough polishing, the concentration of ultra-precision polishing slurry is amplified correctly. So does the ultra-precision polishing velocity, and also the wiping speed is faster in comparison to the deliquescence velocity. The CLBO crystal surface area roughness can attain 1nm and preserve the floor good quality properly. Accessibility through your institution
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In accordance with the evidence-of-theory experiment, the conversion performance of 23% implied the possibility of attaining significant-ability at the 2nd Stokes wavelength of the Raman laser. When the pump laser of 1078 nm could possibly be acquired at the normal power of fifty W, the output ability of its 2nd Stokes wavelength at 1512 nm may be a lot more than 10 W. The design of your Raman laser cavity need to be optimized so that you can stay away from the injury from the M1 and diamond surface.
As an example, the current concave OC could get replaced by a aircraft mirror which could mitigate the power density over the floor of M1 along with the diamond. In addition, utilizing superior hurt threshold coatings for M1 and diamond would also improve the output ability with no damages. Then, the NIR laser within the 2nd Stokes wavelength may be high plenty of, in addition to its superior beam high-quality, to create the ultimate DUV laser at 193 nm using a superior typical electricity.
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On another side, the ability scaling of your NIR laser is an additional element to increase the ordinary energy from the 193-nm DUV laser. As a result of deficiency of the higher-power amplification solution on the NIR laser (as an example at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) can be placed on build a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to obtaining relative better power [21]. Not too long ago, a diamond Raman laser showed its potential in accomplishing a superior ability and a superior conversion performance for the 1st Stokes on the 1-μm laser [22,23], which implies the possibility to be used while in the 193-nm DUV laser generation due to its superior Raman get and large frequency change.
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While in the scientific and industrial programs, the beam high quality in the DUV laser can be a crucial parameter. Specially, the beam top quality of the DUV laser radically impacts the laser machining success. The beam good quality of the DUV laser is set by that of the elemental laser along with the crystal for the frequency conversion. Just lately, a high-electrical power DUV laser (>ten W) at 258 nm was claimed which has a beam top quality of M2 < one.five, which was created by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would lead to a much better laser machining consequence compared to the prior DUV lasers with bigger M2.
The heartbeat period of the second Stokes gentle was shortened to five ns as proven in Figure 7a, only one-shot image with the oscilloscope, that is a typical website phenomenon in Raman laser [forty four] while the pulse length with the pump laser was 10 ns.
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The conversion efficiency from elementary NIR to DUV is from 5% to 36% in accordance with the noted brings about Table one. Increasing the conversion effectiveness will lessen the burden on the look and set up of the fundamental laser amplifier and also the electric powered electrical power use. A great beam excellent of the elemental laser may also lead to your increasing of your conversion efficiency together with the right power intensity from the NIR and eco-friendly laser while in the SHG and FHG course of action, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and close to 50%, respectively [twelve], which corresponds into the conversion performance of 35% from elementary to DUV.
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