Not known Details About CLBO Crystal
Not known Details About CLBO Crystal
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On the other hand, so that you can course of action the crystal is very Sophisticated manufacturing procedures are required. For the reason that dawn of this crystal, working on this challenge, we at the moment are the only real company on this planet that can be processed During this 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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Because of the thermal lens outcome inside the good-state lasers, In case the heating administration is insufficient, It's not at all quick to obtain the reliable-point out laser that has a higher electric power and a substantial beam high-quality simultaneously. Not too long ago, with the development of the thin disk laser and solitary-crystal fiber (SCF) laser, a significant-power laser at the elemental wavelength (one μm) were recognized with a superb beam excellent In spite of a TEM00 mode beam [4,24], which might be very good candidates for the basic from the DUV laser technology. A different applicant for the fundamental may be the substantial-energy fiber laser which can be attained by coherent beam combination with M2 benefit under 1.
On one other aspect, the facility scaling on the NIR laser is another component to improve the regular electric power from the 193-nm DUV laser. Mainly because of the insufficient the significant-power amplification Resolution of your NIR laser (as an example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could be applied to create a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength in addition to getting relative better energy [21]. Recently, a diamond Raman laser showed its capability in reaching a significant electric power plus a significant conversion effectiveness on the 1st Stokes in the 1-μm laser [22,23], which implies the chance to get applied while in the 193-nm DUV laser generation as a consequence of its superior Raman obtain and huge frequency change.
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While in the scientific and industrial programs, the beam excellent in the DUV laser can also be an important parameter. Specially, the beam top quality of the DUV laser considerably impacts the laser machining effects. The beam top quality of your DUV laser is determined by that of the basic laser and the crystal to the frequency conversion. Just lately, a high-electricity DUV laser (>ten W) at 258 nm was noted get more info using a beam excellent of M2 < one.5, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring on a greater laser machining end result compared to the prior DUV lasers with more substantial M2.
The pulse length of the second Stokes gentle was shortened to five ns as proven in Determine 7a, an individual-shot photograph through the oscilloscope, that is a typical phenomenon in Raman laser [forty four] though the heart beat period on the pump laser was ten ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics from the Nd:YAG fundamental laser wavelength. To be able to improve the harm threshold, small CLBO area roughness, by ultra-precision machining, is needed. Because the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-precise machining on the CLBO crystal is actually a tough specialized difficulty.
The beam profile demonstrated in Figure 7b demonstrated an excellent beam good quality as one of several deserves of Raman laser, which might be effective to deliver a 193-nm DUV laser with a top quality beam.
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