CLBO Crystal Secrets
CLBO Crystal Secrets
Blog Article
All-good-state ultraviolet lasers are widely used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small quantity, very long everyday living, significant effectiveness, very good beam quality, extensive tuning and slim spectral line, and so on. Using higher energy close to-infrared coherent light resource as the elemental frequency resource based upon nonlinear tuning know-how, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be a vital method to acquire the ultraviolet coherent light source.
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We summarized The present improvement status from the high-power DUV laser both equally for the wavelength of FHG from the one-μm laser and at 193 nm. The current enhancement in the good-condition/fiber laser, plus the nonlinear optical crystals, prompts not only the common power but will also the beam quality (coherence) on the DUV lasers to an unparalleled level.
The standard electric power on the NIR laser even now has the prospective to get enhanced to tens of watts for instance 70 W [26] In case the double-pass configuration might be utilized for the Yb:YAG SCF amplifier phase. That's why, In the event the conversion efficiency of 31% from NIR to DUV may be nevertheless managed at this greater electric power situation, the common output power on the DUV laser at 258 nm can be more than twenty W, which would certainly be a impressive ability degree with the DUV laser and bring on website the unanticipated DUV laser machining results. Additionally, for prime-energy DUV laser, the UV problems in the nonlinear crystal, such as the windows for CLBO crystal and the mirrors, is an additional crucial parameter for long-lasting and steady Procedure.
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While in the scientific and industrial apps, the beam high-quality of your DUV laser is also an essential parameter. Specially, the beam high-quality with the DUV laser radically impacts the laser machining results. The beam quality with the DUV laser is determined by that of the elemental laser along with the crystal for the frequency conversion. Not long ago, a large-power DUV laser (>ten W) at 258 nm was noted that has a beam top 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 cause a far better laser machining final result when compared with the previous DUV lasers with greater M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics on the Nd:YAG elementary laser wavelength. So as to enrich the hurt threshold, minimal CLBO surface area roughness, by extremely-precision machining, is required. As the CLBO crystal has uncomplicated hydroscopic response and micro scratches in machining, ultra-specific machining on the CLBO crystal can be a challenging technical difficulty.
Tunable ultraviolet laser supply determined by reliable-condition dye laser technological innovation and CsLiB6O10 harmonic era
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The event from the 193-nm laser was shown by stages of SFG. In an effort to scale the DUV laser electricity successfully, a whole new concept in the 193-nm DUV laser technology is presented determined by the diamond Raman laser.