In this particular paper, the new lapping slurry and polishing slurry are released. Plus the deliquescence degree of CLBO is fallen to most affordable. A fresh Functioning technologies is likewise adopted. Immediately after tough sharpening, the concentration of extremely-precision sharpening slurry is enhanced adequately. So does the extremely-precision sharpening velocity, plus the wiping pace is faster as opposed to deliquescence speed. The CLBO crystal surface roughness can achieve 1nm and keep the area excellent properly. Accessibility by means of your establishment
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We summarized The existing enhancement standing in the substantial-ability DUV laser both equally in the wavelength of FHG of the 1-μm laser and at 193 nm. The the latest progress on the solid-state/fiber laser, in addition to the nonlinear optical crystals, prompts not simply the standard electricity but in addition the beam excellent (coherence) with the DUV lasers to an unparalleled degree.
The important thing difficulty of ultraviolet coherent mild resource generally focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the ailments for frequency transformation, so the growth, sizing, problems resistance, conversion efficiency and allowable parameter selection of nonlinear optical crystal are essential A lot more.
On the flip side, the beam quality of the higher energy DUV laser would turn into even worse due to more severe thermal and nonlinear outcomes. For this reason, the frequency conversion procedures really should be thoroughly built to mitigate the aforementioned outcomes. As a result, a large-electrical power DUV laser in website the FHG of 1 μm with a superb beam good quality could possibly be acquired and will be effective for acquiring the shorter wavelength DUV lasers such as 193 nm by SFG.
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On another aspect, the facility scaling with the NIR laser is an additional facet to boost the ordinary electric power on the 193-nm DUV laser. A result of the insufficient the high-electric power amplification Resolution of the NIR laser (one example is at 1553 nm), nonlinear frequency procedures for instance optical parameter oscillation (OPO) may very well be applied to produce a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with obtaining relative increased ability [21]. Not too long ago, a diamond Raman laser confirmed its ability in obtaining a superior energy plus a substantial conversion performance within the 1st Stokes of the 1-μm laser [22,23], which suggests the likelihood being used from the 193-nm DUV laser era as a consequence of its high Raman acquire and large frequency change.
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The pulse period of the second Stokes light was shortened to 5 ns as shown in Figure 7a, a single-shot photo from your oscilloscope, which is a typical phenomenon in Raman laser [forty four] whilst the heartbeat duration in the pump laser was ten ns.
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The beam profile proven in Figure 7b demonstrated a fantastic beam quality as one of many merits of Raman laser, which might be advantageous to create a 193-nm DUV laser with a top 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 substantial as that of KDP. CLBO crystals might be grown within the stoichiometric melt with reduce viscosity.
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