The 2-Minute Rule for CLBO Crystal

The 2-Minute Rule for CLBO Crystal

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All-good-state ultraviolet lasers are actually extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of smaller quantity, extended daily life, substantial effectiveness, great beam high quality, large tuning and slim spectral line, etcetera. Making use of higher energy near-infrared coherent light resource as the elemental frequency supply depending on nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is regarded as a very important method to establish the ultraviolet coherent mild resource.

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We summarized the current development standing from the high-electric power DUV laser the two at the wavelength of FHG on the 1-μm laser and at 193 nm. The new progress in the good-state/fiber laser, together with the nonlinear optical crystals, prompts not merely the average electricity but also the beam good quality (coherence) of the DUV lasers to an unparalleled level.

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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LBO can also be an outstanding nonlinear crystal which is often placed on the SHG within the NIR towards the environmentally friendly. The DUV laser is often understood by two stages of SFG in the LBO crystals considering the fact that there is absolutely no section-matching angle for LBO to transform the green laser at 515 nm or 532 nm for the DUV specifically by SHG [sixteen]. Not long ago, the NSBBF crystal has also revealed its potential to obtain a higher conversion efficiency from 532 nm to 266 nm. The stroll-off angle and deff on the NSBBF are Just about just like All those of CLBO [17].

On the opposite aspect, the ability scaling with the NIR laser is an additional facet to boost the average electrical power of your 193-nm DUV laser. A result of the not enough the superior-power amplification Alternative of the NIR laser (for example at 1553 nm), nonlinear frequency procedures which include optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength and also acquiring relative greater electric power [21]. Lately, a diamond Raman laser showed its potential in achieving a substantial electrical power along with a high conversion effectiveness for the 1st Stokes from the 1-μm laser [22,23], which means the chance to get utilized within the 193-nm DUV laser technology as a consequence of its significant Raman achieve and large frequency change.

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Within the scientific and industrial applications, the beam high-quality with the DUV laser can be a crucial parameter. Especially, the beam high-quality on the DUV laser radically has an effect on the laser machining results. The beam good quality of your DUV laser is set by that of the elemental laser along with the crystal for the frequency conversion. Not long ago, a higher-energy DUV laser (>ten W) at 258 nm was reported by using a beam high-quality of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would result in a much better laser machining consequence compared to the prior DUV lasers with greater M2.

The heartbeat period of the next Stokes light-weight was shortened to 5 ns as revealed in Figure 7a, only one-shot photo in the oscilloscope, and that is a standard phenomenon in Raman laser [44] even though the heart beat period from the pump laser was 10 ns.

Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics in the Nd:YAG basic laser wavelength. In an effort to boost the harm threshold, low CLBO area roughness, by ultra-precision machining, is necessary. Since more info the CLBO crystal has straightforward hydroscopic response and micro scratches in machining, ultra-exact machining of the CLBO crystal is often a challenging technological difficulty.

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Its UV absorption edge reaches a hundred and eighty nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals is usually grown within the stoichiometric soften with reduce viscosity.

The development in the 193-nm laser was shown by stages of SFG. So that you can scale the DUV laser electricity effectively, a different concept on the 193-nm DUV laser technology is presented depending on the diamond Raman laser.