Rumored Buzz on CLBO Crystal
Rumored Buzz on CLBO Crystal
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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。
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LBO is also a superb nonlinear crystal which is always applied to the SHG with the NIR towards the inexperienced. The DUV laser is normally recognized by two levels of SFG during the LBO crystals given that there isn't a section-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm into the DUV directly by SHG [16]. Not too long ago, the NSBBF crystal has also proven its prospective to obtain a higher conversion efficiency from 532 nm to 266 nm. The wander-off angle and deff with the NSBBF are Just about much like These of CLBO [seventeen].
On one other aspect, the facility scaling on the NIR laser is another element to increase the ordinary electric power on the 193-nm DUV laser. As a result of lack of the significant-electricity amplification Remedy of your NIR laser (by way of example at 1553 nm), nonlinear frequency processes for example optical parameter oscillation (OPO) could be applied to establish a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with obtaining relative larger ability [21]. Lately, a diamond Raman laser showed its capability in acquiring a substantial ability along with a large conversion effectiveness with the 1st Stokes with the one-μm laser [22,23], which suggests click here the likelihood to get utilized inside the 193-nm DUV laser era as a result of its higher Raman obtain and large frequency change.
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The beam profile proven in Figure 7b demonstrated a fantastic beam top quality as one of the merits of Raman laser, which would be advantageous to create a 193-nm DUV laser with a high quality beam.
The conversion effectiveness from essential NIR to DUV is from 5% to 36% based on the noted brings about Table one. Escalating the conversion performance will reduce the load on the design and setup of the elemental laser amplifier in addition to the electric powered electrical power intake. A great beam excellent of the elemental laser will even lead to your increasing of your conversion efficiency in addition to the suitable electricity depth on the NIR and environmentally friendly laser in the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [12], which corresponds for the conversion efficiency of 35% from fundamental to DUV.
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