5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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All-strong-state ultraviolet lasers happen to be greatly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of small volume, very long life, higher efficiency, great beam top quality, vast tuning and slender spectral line, and many others. Using higher energy near-infrared coherent gentle source as the basic frequency source depending on nonlinear tuning technology, building ultraviolet coherent radiation by multistage frequency conversion is considered to be a crucial technique to produce the ultraviolet coherent light supply.
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We summarized The present advancement status of the superior-ability DUV laser the two in the wavelength of FHG with the 1-μm laser and at 193 nm. The new advancement of your reliable-point out/fiber laser, plus the nonlinear optical crystals, prompts not only the common ability but additionally the beam excellent (coherence) of the DUV lasers to an unparalleled amount.
As an illustration, The present concave OC could be replaced by a airplane mirror which could mitigate the ability density around the surface of M1 as well as diamond. Additionally, making use of significant injury threshold coatings for M1 and diamond would also Enhance the output electric power without any damages. Then, the NIR laser for the 2nd Stokes wavelength might be higher ample, and also its very good beam high-quality, to produce the ultimate DUV laser at 193 nm having a substantial normal electricity.
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Each the 1040 nm and 1078 nm laser originate from just one dual-wavelength Yb-doped fiber laser. Every laser is amplified by levels of fiber amplifier and Yb-doped supplies amplifier, respectively.
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While in the scientific and industrial apps, the beam excellent of the DUV laser can also be a very important parameter. Significantly, the beam high-quality on the DUV laser substantially affects the laser machining results. The beam excellent of the DUV laser is decided by that of the fundamental laser along with the crystal with the frequency conversion. Lately, a higher-ability DUV laser (>ten W) at 258 nm was reported that has a beam high quality of M2 < one.five, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring about a far better laser machining end result compared to the preceding DUV lasers with more substantial M2.
The heart beat length of the 2nd Stokes mild was shortened to five ns as proven in Figure 7a, only one-shot photo in the oscilloscope, that is a standard phenomenon in Raman laser [44] though the heartbeat period from the pump laser was ten ns.
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The beam profile shown in Figure 7b demonstrated an excellent beam good quality as on the list of deserves of Raman laser, which might be effective to generate a 193-nm DUV laser with a high quality beam.
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