The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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All-stable-point out ultraviolet lasers have already been broadly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of compact quantity, prolonged everyday living, high performance, fantastic beam top quality, vast tuning and slim spectral line, and so forth. Making use of higher electricity in the vicinity of-infrared coherent mild supply as the fundamental frequency supply based on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is viewed as a vital approach to acquire the ultraviolet coherent gentle source.
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We summarized The present improvement position in the high-electric power DUV laser the two at the wavelength of FHG with the one-μm laser and at 193 nm. The latest growth from the solid-condition/fiber laser, in addition to the nonlinear optical crystals, prompts not only the normal energy and also the beam high quality (coherence) on 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。
On the other hand, the beam top quality of the greater electric power DUV laser would turn out to be worse due to a lot more really serious thermal and nonlinear effects. As a result, the frequency conversion processes ought to be meticulously intended to mitigate the aforementioned consequences. Therefore, a substantial-ability DUV laser in the FHG of 1 μm with an excellent beam excellent could be obtained and may be beneficial for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
A result of the thermal lens influence from the strong-point out lasers, In case the heating management is inadequate, It's not at all simple to acquire the strong-point out laser using a high electrical power and a substantial beam quality concurrently. A short while ago, with the event of the thin disk laser and one-crystal fiber (SCF) laser, a large-ability laser at the basic wavelength (one μm) were realized with a great beam high-quality even with a TEM00 method beam [4,24], which would be very good candidates for the basic of your DUV laser era. One more applicant for the basic would be the significant-electric power fiber laser which might be attained by coherent beam mixture with M2 value lower than 1.
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Inside the scientific and industrial applications, the beam top quality from the DUV laser can also be an essential parameter. Significantly, the beam excellent from the DUV laser dramatically influences the laser machining results. The beam excellent from the DUV laser is set by that of the elemental laser as well as the crystal for your frequency conversion. A short while ago, a large-ability DUV laser (>10 W) at 258 nm was described with a beam good quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring on a better laser machining outcome when compared to the former DUV lasers with larger M2.
The heartbeat period of the second Stokes light-weight was shortened to 5 ns as demonstrated in Determine 7a, an individual-shot photograph through the oscilloscope, and that is a common phenomenon in Raman laser [44] when the pulse duration in the pump laser was 10 ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics from the Nd:YAG fundamental laser wavelength. So that you can increase the destruction threshold, low CLBO area roughness, by extremely-precision machining, is required. Since the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-specific machining in the CLBO crystal is really a difficult complex difficulty.
Tunable ultraviolet laser source according to stable-point out dye laser technological know-how and CsLiB6O10 harmonic generation
The conversion efficiency from elementary NIR to DUV is from 5% to 36% in accordance with the documented results in Desk one. Rising the conversion performance will reduce the load on the look and setup of the elemental laser amplifier in addition to the electric powered energy intake. A good beam good check here quality of the elemental laser may also lead into the growing on the conversion performance and the right electrical power intensity with the NIR and environmentally friendly laser within the SHG and FHG method, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by usage of CLBO crystal are 70% and all over 50%, respectively [12], which corresponds towards the conversion efficiency of 35% from fundamental to DUV.
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