CLBO Crystal - An Overview
CLBO Crystal - An Overview
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With this paper, The brand new lapping slurry and polishing slurry are introduced. Along with the deliquescence diploma of CLBO is fallen to least expensive. A new Operating know-how is also adopted. Following tough sprucing, the focus of extremely-precision sharpening slurry is greater correctly. So does the ultra-precision polishing speed, and the wiping pace is faster compared to deliquescence speed. The CLBO crystal area roughness can reach 1nm and hold the surface area top quality effectively. Access as a result of your establishment
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The common electrical power from the NIR laser still has the opportunity being improved to tens of watts which include 70 W [26] In case the double-pass configuration may be utilized for that Yb:YAG SCF amplifier stage. For this reason, If your conversion efficiency of 31% from NIR to DUV may be nonetheless preserved at this higher electricity ailment, the common output energy on the DUV laser at 258 nm can be over twenty W, which might certainly be a remarkable energy degree to the DUV laser and cause the unanticipated DUV laser machining results. What's more, for top-ability DUV laser, the UV destruction of the nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is an additional crucial parameter for long lasting and stable Procedure.
However, the beam high-quality of this better energy DUV laser would grow to be even worse due to a lot more really serious thermal and nonlinear consequences. For this reason, the frequency conversion procedures need to be cautiously created to mitigate the aforementioned outcomes. So, a high-energy DUV laser in the FHG of 1 μm with a good beam high quality might be obtained and will be helpful for obtaining the shorter wavelength DUV lasers like 193 nm by SFG.
LBO can be a wonderful nonlinear crystal which is always placed on the SHG in the NIR into the green. The DUV laser is normally recognized by two phases of SFG while in the LBO crystals considering the fact that there isn't any period-matching angle for LBO to transform the inexperienced laser at 515 nm or 532 nm on the DUV right by SHG [16]. Not too long ago, the NSBBF crystal has also proven its possible to obtain a high conversion performance from 532 nm to 266 nm. The stroll-off angle and deff on the NSBBF are Practically similar to Those people of CLBO [seventeen].
On the other side, the ability scaling of the NIR laser is an additional element to increase the ordinary electric power on the 193-nm DUV laser. As a result of lack of the significant-electrical power amplification solution of the NIR laser (such as at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) may be placed on create a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength as well as obtaining relative increased ability [21]. Not too long ago, a diamond Raman laser showed its capacity in achieving a substantial electric power and a higher conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which implies the possibility to be utilized while in the 193-nm DUV laser generation because of its substantial Raman achieve and huge frequency shift.
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The heart beat period of the second Stokes gentle was shortened to five ns as shown in Figure 7a, only one-shot picture with the oscilloscope, that is a typical phenomenon in Raman laser [44] when the heart get more info beat duration in the pump laser was 10 ns.
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