CLBO Crystal Fundamentals Explained
CLBO Crystal Fundamentals Explained
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On this paper, The brand new lapping slurry and polishing slurry are launched. And also the deliquescence degree of CLBO is fallen to most affordable. A whole new Doing work technology is additionally adopted. Just after tough polishing, the concentration of ultra-precision sprucing slurry is enhanced appropriately. So does the ultra-precision sprucing speed, and the wiping pace is quicker as opposed to deliquescence speed. The CLBO crystal surface roughness can attain 1nm and maintain the area high-quality perfectly. Entry as a result of your establishment
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The standard electricity in the NIR laser still has the probable to get enhanced to tens of watts like 70 W [26] If your double-move configuration could be utilized for that Yb:YAG SCF amplifier phase. Hence, If your conversion efficiency of 31% from NIR to DUV may very well be however maintained at this better electricity problem, the typical output energy of your DUV laser at 258 nm could be in excess of 20 W, which might be considered a outstanding power level for your DUV laser and bring about the unanticipated DUV laser machining final results. Furthermore, for top-electricity DUV laser, the UV injury with the nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is an additional critical parameter for long run and steady operation.
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On the opposite side, the facility scaling on the NIR laser is another element to increase the ordinary electrical power from the 193-nm DUV laser. Because of the not enough the significant-electrical power amplification Answer of the NIR laser (such as at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) may be applied to build a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to acquiring relative bigger electrical power [21]. A short while ago, a diamond Raman laser showed its capacity in accomplishing a high energy plus a large conversion effectiveness on the 1st Stokes with the one-μm laser [22,23], which means the likelihood to get utilized from the 193-nm DUV laser technology thanks to its high Raman acquire and large frequency shift.
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In the scientific and industrial applications, the beam excellent with the DUV laser is likewise a very important parameter. Significantly, the beam excellent in the DUV laser drastically affects the laser machining success. The beam good quality in the DUV laser is set by that of the fundamental laser plus the crystal to the frequency conversion. Lately, a superior-electricity DUV laser (>ten W) at 258 nm was documented by using a beam excellent of M2 < 1.five, which was generated by FHG of a Yb:YAG CLBO Crystal laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would cause a greater laser machining consequence in comparison to the previous DUV lasers with more substantial M2.
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The beam profile shown in Figure 7b shown an excellent beam top quality as among the list of deserves of Raman laser, which would be useful to make a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals may be developed through the stoichiometric melt with lessen viscosity.
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