However, to be able to approach the crystal is rather Sophisticated producing approaches are necessary. Considering that the dawn of this crystal, engaged on this obstacle, we are actually the only real firm in the world that could be processed Within this crystal.
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We summarized The present improvement position in the high-ability DUV laser both of those with the wavelength of FHG from the one-μm laser and at 193 nm. The latest development on the solid-condition/fiber laser, and also the nonlinear optical crystals, prompts not merely the standard electrical power but in addition the beam quality (coherence) on the DUV lasers to an unparalleled amount.
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。
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Due to the thermal lens outcome from the reliable-state lasers, Should the heating management is inadequate, It's not necessarily straightforward to acquire the reliable-point out laser that has a higher ability plus a superior beam good quality at the same time. Not too long ago, with the event of The skinny disk laser and one-crystal fiber (SCF) laser, a higher-electric power laser at the elemental wavelength (one μm) had been realized with a superb beam high-quality even with a TEM00 mode beam [4,24], which would be superior candidates for the elemental of the DUV laser generation. An additional candidate for the fundamental will be the significant-electricity fiber laser which may very well be realized by coherent beam blend with M2 worth lower than one.
On one other aspect, the power scaling of your NIR laser is an additional facet to boost the average power with the 193-nm DUV laser. here Because of the deficiency of the large-energy amplification Alternative in the NIR laser (one example is at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could possibly be applied to build a wavelength converter by shifting the wavelength from one μm to the specified wavelength along with getting relative greater electric power [21]. Lately, a diamond Raman laser showed its potential in acquiring a higher electricity and also a superior conversion effectiveness with the 1st Stokes with the one-μm laser [22,23], which means the chance to become applied within the 193-nm DUV laser generation due to its higher Raman obtain and large frequency change.
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Within the scientific and industrial programs, the beam good quality on the DUV laser can be a vital parameter. Notably, the beam top quality from the DUV laser dramatically has an effect on the laser machining benefits. The beam high quality of your DUV laser is set by that of the fundamental laser plus the crystal for your frequency conversion. Recently, a substantial-energy DUV laser (>ten W) at 258 nm was noted that has a beam top 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 lead to an improved laser machining final result in comparison with the past DUV lasers with larger M2.
The pulse period of the next Stokes gentle was shortened to 5 ns as revealed in Figure 7a, only one-shot image from the oscilloscope, and that is a common phenomenon in Raman laser [forty four] while the heartbeat length from the pump laser was 10 ns.
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Tunable ultraviolet laser supply based upon stable-condition dye laser technological know-how and CsLiB6O10 harmonic technology
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