Having said that, in order to process the crystal is very advanced producing tactics are necessary. Because the dawn of the crystal, working on this challenge, we are now the only real organization in the world that could be processed in this crystal.
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We summarized the current development position in the significant-electrical power DUV laser each for the wavelength of FHG in the one-μm laser and at 193 nm. The current progress on the strong-condition/fiber laser, and also the nonlinear optical crystals, prompts not simply the common power and also the beam top quality (coherence) with the DUV lasers to an unprecedented degree.
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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Both of those the 1040 nm and 1078 nm laser originate from a person twin-wavelength Yb-doped fiber laser. Just about every laser is amplified by levels of fiber amplifier click here and Yb-doped products amplifier, respectively.
On another side, the power scaling of the NIR laser is yet another aspect to improve the regular energy of the 193-nm DUV laser. Because of the lack of the substantial-electrical power amplification Alternative in the NIR laser (for example at 1553 nm), nonlinear frequency processes such as optical parameter oscillation (OPO) may very well be placed on develop a wavelength converter by shifting the wavelength from one μm to the specified wavelength and also getting relative bigger electrical power [21]. A short while ago, a diamond Raman laser confirmed its potential in reaching a significant energy plus a superior conversion efficiency in the 1st Stokes on the one-μm laser [22,23], which suggests the likelihood to get utilized while in the 193-nm DUV laser generation because of its higher Raman obtain and large frequency shift.
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The beam profile revealed in Figure 7b demonstrated a fantastic beam high quality as on the list of merits of Raman laser, which would be helpful to crank out a 193-nm DUV laser with a top quality beam.
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