During this paper, the new lapping slurry and sharpening slurry are launched. Along with the deliquescence diploma of CLBO is fallen to lowest. A different Operating technological know-how is additionally adopted. Immediately after tough polishing, the concentration of extremely-precision sprucing slurry is increased correctly. So does the ultra-precision sprucing velocity, and also the wiping speed is faster compared to the deliquescence speed. The CLBO crystal area roughness can obtain 1nm and retain the floor high quality effectively. Access through your establishment
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The crucial element dilemma of ultraviolet coherent gentle resource predominantly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the disorders for frequency transformation, so The expansion, size, injury resistance, conversion efficiency and allowable parameter variety of nonlinear optical crystal are essential Progressively more.
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LBO is usually an outstanding nonlinear crystal which is usually placed on the SHG with the NIR to your eco-friendly. The DUV laser is frequently realized by two stages of SFG inside the LBO crystals considering the fact that there isn't a stage-matching angle for LBO to convert the environmentally friendly laser at 515 nm or 532 nm for the DUV directly by SHG [16]. Lately, the NSBBF crystal has also revealed its potential to acquire a substantial conversion performance from 532 nm to 266 nm. The walk-off angle and deff of your NSBBF are Just about comparable to Those people of CLBO [17].
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While in the scientific and industrial apps, the beam quality with the DUV laser can also be a significant parameter. Significantly, the beam quality of your DUV laser significantly influences the laser machining benefits. The beam high quality of the DUV laser is decided by that of the basic laser plus the crystal for the frequency conversion. Lately, a high-ability DUV laser (>10 W) at 258 nm was described with a beam good quality of M2 < one.5, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would result in an improved laser machining final result when compared with the past DUV lasers with more substantial M2.
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What's more, combining the reliable-point click here out laser with other nonlinear method such as stimulated Raman scattering, NIR lasers may be obtained at new wavelengths with substantial power and large beam quality, which was tested with the proof-of-principle experiment. This Raman laser scheme delivers a new route to the significant-power DUV laser, Particularly with the wavelength of 193 nm.
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The conversion performance from elementary NIR to DUV is from 5% to 36% according to the noted leads to Desk 1. Rising the conversion effectiveness will decrease the burden on the design and setup of the fundamental laser amplifier and also the electric powered electrical power usage. A superb beam excellent of the fundamental laser will even contribute for the rising with the conversion efficiency along with the suitable electrical power intensity from the NIR and inexperienced laser inside the SHG and FHG course of action, respectively. The very best conversion efficiencies from NIR to green and eco-friendly to DUV laser by use of CLBO crystal are 70% and all over fifty%, respectively [twelve], which corresponds for the conversion efficiency of 35% from fundamental to DUV.
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