All-solid-condition ultraviolet lasers are already greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of tiny quantity, very long life, higher efficiency, great beam top quality, broad tuning and narrow spectral line, and so on. Making use of large electrical power around-infrared coherent gentle resource as the elemental frequency resource based on nonlinear tuning know-how, building ultraviolet coherent radiation by multistage frequency conversion is considered an important technique to create the ultraviolet coherent light source.

When compared to BBO it attributes larger spectral and temperature acceptance, better angle tolerance, plus a more compact stroll-off angle. from 3289 $ delivery

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The average electric power of the NIR laser nonetheless has the likely for being improved to tens of watts for example 70 W [26] In case the double-pass configuration might be used with the Yb:YAG SCF amplifier phase. For this reason, If your conversion performance of 31% from NIR to DUV could possibly be nevertheless preserved at this bigger electric power situation, the common output electric power of the DUV laser at 258 nm may be in excess of twenty W, which would become a amazing ability amount for that DUV laser and lead to the unanticipated DUV laser machining results. Moreover, for high-energy DUV laser, the UV harm of the nonlinear crystal, such as the Home windows for CLBO crystal and the mirrors, is yet another critical parameter for long run and steady Procedure.

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LBO can be an excellent nonlinear crystal which is usually placed on the SHG with the NIR to your eco-friendly. The DUV laser will likely be understood by two levels of SFG while in the LBO crystals considering that there is absolutely no phase-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm into the DUV immediately by SHG [sixteen]. A short while ago, the NSBBF crystal has also shown its probable to acquire a superior conversion efficiency from 532 nm to 266 nm. The stroll-off angle and deff on the NSBBF are Pretty much just like Individuals of CLBO [17].

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In the scientific and industrial applications, the beam excellent of your DUV laser is likewise a crucial parameter. Specially, the beam high quality in the DUV laser drastically impacts the laser machining final results. The beam good quality of the DUV laser is decided by that of the basic laser as well as crystal with the frequency conversion. Not long ago, a large-electricity DUV laser (>ten W) at 258 nm was claimed using a beam top quality of M2 < one.5, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring about check here an improved laser machining outcome as compared to the prior DUV lasers with bigger M2.

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In addition, combining the sound-point out laser with other nonlinear course of action for instance stimulated Raman scattering, NIR lasers could be obtained at new wavelengths with higher electricity and high beam quality, which was analyzed through the proof-of-theory experiment. This Raman laser scheme delivers a new route to the substantial-ability DUV laser, Specially in the wavelength of 193 nm.

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The conversion effectiveness from elementary NIR to DUV is from five% to 36% in accordance with the documented results in Desk one. Rising the conversion efficiency will decrease the stress on the design and set up of the elemental laser amplifier plus the electric powered electricity consumption. An excellent beam high-quality of the fundamental laser may even add for the expanding from the conversion effectiveness and also the suitable electric power depth with the NIR and environmentally friendly laser in the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to green and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all over 50%, respectively [12], which corresponds to the conversion performance of 35% from elementary to DUV.

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