All-reliable-condition ultraviolet lasers are commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of modest volume, long lifestyle, higher performance, fantastic beam good quality, vast tuning and narrow spectral line, and so forth. Using higher ability in close proximity to-infrared coherent mild resource as the basic frequency resource dependant on nonlinear tuning technology, producing ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital technique to develop the ultraviolet coherent gentle resource.
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In accordance with the evidence-of-principle experiment, the conversion effectiveness of 23% implied the opportunity of achieving large-electricity at the next Stokes wavelength on the Raman laser. If your pump laser of 1078 nm can be attained at the normal electricity of 50 W, the output ability of its 2nd Stokes wavelength at 1512 nm can be much more than ten W. The look on the Raman laser cavity ought to be optimized to be able to steer clear of the injury from the M1 and diamond surface.
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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On the opposite side, the facility scaling in the NIR laser is yet another facet to increase the regular power on the 193-nm DUV laser. Because of the not enough the substantial-power amplification Option of the NIR laser (such as at 1553 nm), nonlinear frequency processes like optical parameter oscillation (OPO) can be applied to make a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength as well as acquiring relative better power [21]. Not too long ago, a diamond Raman laser confirmed its skill in accomplishing a superior energy along with a high conversion efficiency with the 1st Stokes in the one-μm laser [22,23], which suggests the possibility to generally be utilized while in the 193-nm DUV laser generation thanks to its superior Raman gain and large frequency shift.
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The heartbeat period of the next Stokes light-weight was shortened to 5 ns as revealed in Figure 7a, one-shot picture with the oscilloscope, that is a standard phenomenon in Raman laser [44] when the more info pulse duration with the pump laser was 10 ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics in the Nd:YAG fundamental laser wavelength. So as to increase the problems threshold, lower CLBO surface roughness, by ultra-precision machining, is necessary. As the CLBO crystal has uncomplicated hydroscopic reaction and micro scratches in machining, extremely-exact machining from the CLBO crystal is usually a difficult complex problem.
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