Even so, so that you can approach the crystal is rather Innovative producing strategies are necessary. Considering that the dawn of the crystal, engaged on this obstacle, we at the moment are the sole company on the planet that may be processed in this crystal.
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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 good quality of this bigger ability DUV laser would grow to be even worse as a consequence of a lot more significant thermal and nonlinear effects. Consequently, the frequency conversion procedures needs to be carefully intended to mitigate the aforementioned outcomes. Consequently, a significant-electricity DUV laser within the FHG of 1 μm with a superb beam high-quality could be acquired and can be advantageous for acquiring the shorter wavelength DUV lasers for instance 193 nm by SFG.
LBO is also a superb nonlinear crystal which is usually placed on the SHG in the NIR to the environmentally friendly. The DUV laser is usually understood by two levels of SFG inside the LBO crystals since there isn't a phase-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm towards the DUV specifically by SHG [16]. Just lately, the NSBBF crystal has also revealed its potential to acquire a significant conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff of your NSBBF are Virtually much like People of CLBO [seventeen].
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From the scientific and industrial applications, the beam quality with the DUV laser can be a vital parameter. Notably, the beam excellent from the DUV laser considerably has an effect on the laser machining final results. The beam top quality of your DUV laser is decided by that of the elemental laser and also the crystal for the frequency conversion. Not long ago, a substantial-power DUV laser (>10 W) at 258 nm was reported having a beam top quality of M2 < 1.five, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in a better laser machining result as compared to the prior DUV lasers with more substantial M2.
The pulse length of the 2nd Stokes mild was shortened to five ns as revealed in Determine 7a, only one-shot photograph through the oscilloscope, that's a typical phenomenon in Raman laser [forty four] whilst the heartbeat period of your pump laser was 10 ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics with the Nd:YAG essential laser wavelength. As a way to greatly enhance the damage threshold, small CLBO surface roughness, by extremely-precision machining, is required. Because the CLBO crystal has easy hydroscopic response and micro scratches in machining, ultra-exact machining of the CLBO crystal is really a hard specialized challenge.
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