Within this paper, the new lapping slurry and polishing slurry are released. And also the deliquescence diploma of CLBO is fallen to lowest. A whole new working know-how is also adopted. Soon after rough sharpening, the concentration of ultra-precision polishing slurry is improved appropriately. So does the ultra-precision polishing speed, and also the wiping velocity is quicker compared to deliquescence pace. The CLBO crystal surface area roughness can obtain 1nm and retain the area high-quality perfectly. Obtain as a result of your institution
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According to the evidence-of-basic principle experiment, the conversion performance of 23% implied the possibility of obtaining superior-electrical power at the next Stokes wavelength of your Raman laser. When the pump laser of 1078 nm may very well be obtained at the common electric power of fifty W, the output electricity 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 as a way to avoid the harm of the M1 and diamond area.
The average power of your NIR laser however has the likely to become improved to tens of watts like 70 W [26] Should the double-move configuration might be used for your Yb:YAG SCF amplifier stage. Therefore, if the conversion effectiveness of 31% from NIR to DUV could possibly be still maintained at this bigger electricity situation, the normal output energy with the DUV laser at 258 nm could be over 20 W, which would be described as a extraordinary power degree to the DUV laser and cause the unanticipated DUV laser machining effects. Furthermore, for high-electricity DUV laser, the UV destruction of the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is an additional vital parameter for long-lasting and secure Procedure.
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On one other aspect, the ability scaling in the NIR laser is an additional element to boost the typical power of the 193-nm DUV laser. Due to the not enough the substantial-electrical power amplification Resolution on the NIR laser (as an example at 1553 nm), nonlinear frequency procedures for instance optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from one μm to the specified CLBO Crystal wavelength in addition to acquiring relative bigger energy [21]. Not long ago, a diamond Raman laser confirmed its capability in obtaining a superior electricity along with a substantial conversion performance at the 1st Stokes in the 1-μm laser [22,23], which suggests the likelihood to be applied inside the 193-nm DUV laser era as a consequence of its superior Raman get and huge frequency shift.
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Within the scientific and industrial applications, the beam high quality from the DUV laser can be a vital parameter. Notably, the beam top quality from the DUV laser substantially affects the laser machining success. The beam good quality of the DUV laser is set by that of the fundamental laser and also the crystal for the frequency conversion. A short while ago, a significant-electrical power DUV laser (>ten W) at 258 nm was documented having a beam excellent of M2 < 1.5, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would cause an improved laser machining result when compared with the previous DUV lasers with larger sized M2.
The heartbeat duration of the second Stokes light-weight was shortened to 5 ns as revealed in Figure 7a, only one-shot image from the oscilloscope, which happens to be a common phenomenon in Raman laser [forty four] while the heartbeat period in the pump laser was ten ns.
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The event of your 193-nm laser was demonstrated by phases of SFG. In an effort to scale the DUV laser electrical power properly, a whole new thought on the 193-nm DUV laser technology is introduced depending on the diamond Raman laser.