A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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All-reliable-condition ultraviolet lasers are commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small quantity, very long daily life, significant performance, fantastic beam good quality, vast tuning and narrow spectral line, and many others. Using higher electric power around-infrared coherent light resource as the fundamental frequency source dependant on nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital way 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。
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Due to the thermal lens outcome from the reliable-state lasers, if the heating administration is inadequate, It's not necessarily straightforward to acquire the reliable-point out laser using a large electricity and a substantial beam quality concurrently. A short while ago, with the development of the thin disk laser and solitary-crystal fiber (SCF) laser, a superior-electrical power laser at the basic wavelength (one μm) were realized with an excellent beam top quality Despite a TEM00 manner beam [four,24], which might be superior candidates for the elemental from the DUV laser generation. Yet another applicant for the basic would be the substantial-electric power fiber laser which could possibly be realized by coherent beam blend with M2 price below 1.
On the other facet, the ability scaling with the NIR laser is an additional facet to boost the average ability on the 193-nm DUV laser. A result of the lack of the large-energy amplification Resolution from the NIR laser (for instance at 1553 nm), nonlinear frequency processes like optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength along with getting relative greater electric power [21]. Just lately, a diamond Raman laser showed its capacity in obtaining a high electric power and a substantial conversion effectiveness on the 1st Stokes in the one-μm laser [22,23], which means the chance to become used in the 193-nm DUV laser generation thanks to its superior Raman obtain and large frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of your Nd:YAG essential laser wavelength. So that you can enrich the problems threshold, lower CLBO surface area roughness, by extremely-precision machining, is required. Because the CLBO crystal has easy hydroscopic response and micro scratches in machining, ultra-specific machining on the CLBO crystal is actually a tough technical issue.
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The conversion efficiency from elementary NIR to DUV is from 5% to 36% in accordance with the documented leads to Desk one. Expanding the conversion performance will lessen the stress on the look and set up of the elemental laser amplifier as well as the electric electrical power use. A great beam good quality of the elemental laser may also lead to your increasing in the conversion effectiveness and also the right ability depth of the NIR and green laser within the SHG and FHG method, respectively. The very best conversion efficiencies from NIR to eco-friendly and green to DUV laser by usage of CLBO crystal are 70% and around fifty%, respectively [12], which corresponds to your conversion effectiveness of 35% from basic to DUV.
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