Rumored Buzz on CLBO Crystal
Rumored Buzz on CLBO Crystal
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Within this paper, The brand new lapping slurry and polishing slurry are launched. And the deliquescence degree of CLBO is fallen to least expensive. A completely new Operating technologies can be adopted. Soon after tough polishing, the concentration of ultra-precision polishing slurry is amplified effectively. So does the extremely-precision sprucing speed, as well as wiping velocity is quicker compared to the deliquescence speed. The CLBO crystal surface area roughness can accomplish 1nm and hold the surface area top quality effectively. Accessibility through your establishment
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全固态紫外激光器以其体积小、寿命长、效率高、光束质量好、调谐范围宽、谱线窄等优点，广泛应用于机械探伤、光刻、微加工和医学等领域，等，利用大功率近红外相干光源作为基于非线性调谐技术的基频源，通过多级变频产生紫外相干辐射被认为是发展紫外相干光源的重要途径。紫外相干光源的关键问题是研制紫外波段的非线性光学变频晶体。非线性光学晶体是实现频率变换的条件之一，因此对非线性光学晶体的生长、尺寸、损伤电阻、转换效率和允许的参数范围提出了越来越高的要求。
Then again, the beam top quality of the increased electricity DUV laser would turn into worse as a consequence of a lot more really serious thermal and nonlinear effects. Consequently, the frequency conversion procedures ought to be thoroughly meant to mitigate the aforementioned effects. Therefore, a higher-electrical power DUV laser with the FHG of one μm with a great beam good quality may very well be attained and may be useful for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
LBO is likewise a great nonlinear crystal which is often applied to the SHG with the NIR on the eco-friendly. The DUV laser will likely be realized by two phases of SFG in the LBO crystals considering that there isn't any phase-matching angle for LBO to transform the green laser at 515 nm or 532 nm to the DUV straight by SHG [16]. Not too long ago, the NSBBF crystal has also proven its likely to get a large conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff of your NSBBF are Just about just like Individuals of CLBO [17].
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From the scientific and industrial apps, the beam excellent with the DUV laser is likewise a vital parameter. Specially, the beam good quality in the DUV laser radically has an effect on the laser machining final results. The beam quality on the DUV laser is decided by that of the fundamental laser plus the crystal for the frequency conversion. Not long ago, a high-electricity DUV laser (>ten W) at 258 nm was claimed having a beam good quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would result in a much better laser machining final result when compared to the prior DUV lasers with much larger M2.
The heartbeat period of the next Stokes mild was shortened to five ns as proven in Figure 7a, just one-shot photograph through the oscilloscope, which can be a common phenomenon in Raman laser [44] while the heart beat duration with the pump laser was 10 ns.
What's more, combining the reliable-point out laser with other nonlinear approach check here including stimulated Raman scattering, NIR lasers could possibly be realized at new wavelengths with higher electric power and high beam top quality, which was examined via the evidence-of-basic principle experiment. This Raman laser scheme offers a whole new route to the substantial-electric power DUV laser, especially at the wavelength of 193 nm.
The beam profile shown in Figure 7b demonstrated a fantastic beam quality as one of many deserves of Raman laser, which might be effective to produce a 193-nm DUV laser with a high quality beam.
The conversion effectiveness from fundamental NIR to DUV is from five% to 36% based on the reported ends in Table one. Rising the conversion efficiency will lessen the burden on the look and setup of the fundamental laser amplifier along with the electrical power usage. A fantastic beam top quality of the basic laser will also contribute on the increasing from the conversion effectiveness together with the right energy intensity in the NIR and inexperienced laser from the SHG and FHG system, respectively. The best conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by use of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds towards the conversion efficiency of 35% from essential to DUV.
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