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We summarized The existing growth status of your significant-electrical power DUV laser both for the wavelength of FHG on the one-μm laser and at 193 nm. The modern improvement with the strong-condition/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the standard electricity but additionally the beam quality (coherence) on the DUV lasers to an unparalleled amount.
The important thing dilemma of ultraviolet coherent light-weight source primarily focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the conditions for frequency transformation, so the growth, dimension, harm resistance, conversion efficiency and allowable parameter range of nonlinear optical crystal are required A growing number of.
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Within the scientific and industrial applications, the beam top quality from the DUV laser can also be an important parameter. Particularly, the beam high-quality on the DUV laser substantially affects the laser machining success. The beam good quality from the DUV laser is decided by that of the fundamental laser plus the crystal for your frequency conversion. Recently, a substantial-energy DUV laser (>ten W) at 258 nm was reported by using a beam quality of M2 < one.5, which was produced by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring on a greater laser machining consequence in comparison to the past DUV lasers with bigger M2.
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Tunable ultraviolet laser source according to sound-condition dye click here laser know-how and CsLiB6O10 harmonic era
The conversion effectiveness from essential NIR to DUV is from five% to 36% according to the described brings about Desk 1. Rising the conversion performance will reduce the stress on the look and set up of the fundamental laser amplifier together with the electric powered ability use. A very good beam high-quality of the fundamental laser will also contribute to the escalating of your conversion performance and the right electric power depth in the NIR and eco-friendly laser in the SHG and FHG system, respectively. The highest conversion efficiencies from NIR to environmentally friendly and eco-friendly to DUV laser by usage of CLBO crystal are 70% and all over 50%, respectively [12], which corresponds on the conversion effectiveness of 35% from fundamental to DUV.
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