A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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All-solid-point out ultraviolet lasers have been extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of compact quantity, extensive lifestyle, higher performance, superior beam excellent, extensive tuning and narrow spectral line, etc. Employing substantial electricity close to-infrared coherent light-weight supply as the basic frequency source depending on nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is thought to be an essential method to establish the ultraviolet coherent gentle resource.
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As an illustration, The present concave OC could be replaced by a airplane mirror which could mitigate the facility density to the area of M1 as well as the diamond. Moreover, using higher hurt threshold coatings for M1 and diamond would also Enhance the output electrical power without any damages. Then, the NIR laser with the 2nd Stokes wavelength might be substantial ample, together with its fantastic beam high quality, to make the final DUV laser at 193 nm which has a higher regular energy.
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Because of the thermal lens impact within the good-point out lasers, Should the heating administration is insufficient, it is not quick to obtain the strong-state laser having a high electric power as well as a large beam quality at the same time. Just lately, with the development of The skinny disk laser and solitary-crystal fiber (SCF) laser, a high-electric power laser at the fundamental wavelength (1 μm) were recognized with a great beam excellent In spite of a TEM00 method beam [four,24], which would be very good candidates for the fundamental from the DUV laser era. A further candidate for the basic is definitely the superior-electric power fiber laser which may very well be obtained by coherent beam combination with M2 worth a lot less than 1.
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Within the scientific and industrial applications, the beam top quality of the DUV laser is likewise a very important parameter. Particularly, the beam excellent on the DUV laser substantially impacts the laser machining benefits. The beam high-quality on the DUV laser is set by that of the fundamental laser plus the crystal with the frequency conversion. Just lately, a substantial-power DUV laser (>ten W) at 258 nm was described with a beam excellent of M2 < one.5, which was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would lead to an improved laser machining final result in comparison to the former DUV lasers with more substantial M2.
The pulse duration of the second Stokes light-weight was shortened to five ns as demonstrated in Determine 7a, a single-shot photograph with the oscilloscope, that is a typical phenomenon in Raman laser [forty four] although the heart beat length of your pump laser was 10 ns.
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The beam profile shown in Figure 7b shown a good beam high quality as among the list of merits of Raman laser, which would be advantageous to crank out a 193-nm DUV laser with a high quality beam.
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The development with the 193-nm here laser was demonstrated by phases of SFG. To be able to scale the DUV laser ability efficiently, a whole new thought in the 193-nm DUV laser era is introduced depending on the diamond Raman laser.