Not known Factual Statements About CLBO Crystal
Not known Factual Statements About CLBO Crystal
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All-reliable-condition ultraviolet lasers are actually widely used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the benefits of small quantity, lengthy existence, higher efficiency, good beam good quality, large tuning and slender spectral line, etcetera. Making use of substantial power close to-infrared coherent gentle resource as the fundamental frequency resource dependant on nonlinear tuning engineering, generating ultraviolet coherent radiation by multistage frequency conversion is thought to be a crucial solution to establish the ultraviolet coherent light supply.
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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。
Alternatively, the beam high-quality of this larger electricity DUV laser would become worse as a result of far more critical thermal and nonlinear outcomes. For this reason, the frequency conversion processes needs to be very carefully created to mitigate the aforementioned results. Consequently, a large-electricity DUV laser for the FHG of one μm with a fantastic beam excellent may very well be acquired and will be effective for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
Both the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Each laser is amplified by levels of fiber amplifier and Yb-doped elements amplifier, respectively.
On the other facet, the power scaling with the NIR laser is another facet to increase the regular energy with the 193-nm DUV laser. As a result of not enough the large-ability amplification Resolution of the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures which include optical parameter oscillation (OPO) could possibly be placed on develop a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to acquiring relative larger electricity [21]. Not long ago, a diamond Raman laser showed its capacity in attaining a large electrical power plus a significant conversion effectiveness at the 1st Stokes of the one-μm laser [22,23], which suggests the possibility to generally be utilized inside the 193-nm DUV laser era thanks to its significant Raman achieve and large frequency change.
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Furthermore, combining the strong-condition laser with other nonlinear approach like stimulated Raman scattering, NIR lasers might be realized at new wavelengths with significant ability and high beam quality, which was tested by the evidence-of-theory experiment. This Raman laser plan supplies a whole new route to the higher-power DUV laser, especially within the wavelength of 193 nm.
The beam profile demonstrated in Determine 7b demonstrated an excellent beam good quality as one of several merits of Raman laser, which would be beneficial to deliver a 193-nm DUV laser with a top quality beam.
The conversion performance from fundamental NIR to DUV is from 5% to 36% in accordance with the documented brings about Table 1. Increasing the conversion effectiveness will decrease the stress on the design and setup of the basic laser amplifier and also the electric electricity intake. A good beam high-quality of the fundamental laser may also contribute for the rising with the conversion performance in addition to the appropriate electricity intensity in the NIR and eco-friendly laser inside the SHG and FHG method, respectively. The highest conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by use of CLBO crystal are 70% and around fifty%, respectively [12], which corresponds towards the conversion performance of 35% from elementary to DUV.
The development of your 193-nm laser was shown by levels of SFG. To be able to scale the DUV laser electric power successfully, a different concept in the 193-nm DUV laser era is introduced based on the diamond Raman laser.