Nonetheless, in order to system the crystal is rather Superior producing tactics are necessary. Because the dawn of the crystal, focusing on this obstacle, we are now the one corporation in the world which might be processed in this crystal.
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In accordance with the evidence-of-basic principle experiment, the conversion effectiveness of 23% implied the opportunity of accomplishing higher-ability at the second Stokes wavelength in the Raman laser. Should the pump laser of 1078 nm could possibly be obtained at the normal electric power of fifty W, the output ability of its 2nd Stokes wavelength at 1512 nm could possibly be much more than 10 W. The design of your Raman laser cavity ought to be optimized so as to avoid the hurt with the M1 and diamond floor.
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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The two the 1040 nm and 1078 nm laser come from a person twin-wavelength Yb-doped fiber laser. Each and every laser is amplified by levels of fiber amplifier and Yb-doped elements amplifier, respectively.
On the opposite facet, the ability scaling of the NIR laser is yet another factor to increase the normal electrical power of the 193-nm DUV laser. Mainly because of the insufficient the superior-electricity amplification solution on the NIR laser (for instance at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) may very well be applied to develop a wavelength converter website by shifting the wavelength from one μm to the desired wavelength and also getting relative increased power [21]. A short while ago, a diamond Raman laser confirmed its capability in obtaining a superior electrical power and also a superior conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which suggests the chance to be applied inside the 193-nm DUV laser era thanks to its high Raman obtain and huge frequency change.
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The heartbeat period of the second Stokes mild was shortened to five ns as shown in Figure 7a, only one-shot picture with the oscilloscope, which is a typical phenomenon in Raman laser [forty four] while the pulse length in the pump laser was ten ns.
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The beam profile proven in Determine 7b demonstrated a very good beam top quality as one of the deserves of Raman laser, which might be useful to generate a 193-nm DUV laser with a top quality beam.
The conversion efficiency from basic NIR to DUV is from five% to 36% in accordance with the reported results in Table 1. Raising the conversion performance will reduce the burden on the design and setup of the basic laser amplifier together with the electric powered power consumption. An excellent beam good quality of the basic laser can even add into the increasing of the conversion efficiency in addition to the appropriate electricity depth with the NIR and environmentally friendly laser while in the SHG and FHG approach, respectively. The best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [twelve], which corresponds to your conversion efficiency of 35% from basic to DUV.
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