CLBO Crystal Fundamentals Explained

All-reliable-point out ultraviolet lasers have been extensively used in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of compact quantity, extensive everyday living, significant performance, superior beam high-quality, huge tuning and slim spectral line, etc. Employing significant electric power in the vicinity of-infrared coherent mild source as the elemental frequency source based on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is thought to be a very important way to acquire the ultraviolet coherent light supply.

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The standard ability with the NIR laser even now has the prospective to become enhanced to tens of watts for example 70 W [26] When the double-go configuration may be utilized to the Yb:YAG SCF amplifier stage. As a result, In case the conversion efficiency of 31% from NIR to DUV may very well be nonetheless preserved at this greater electric power situation, the common output power with the DUV laser at 258 nm might be greater than 20 W, which would be described as a extraordinary energy degree with the DUV laser and lead to the unanticipated DUV laser machining final results. Additionally, for high-electrical power DUV laser, the UV hurt with the nonlinear crystal, such as the windows for CLBO crystal as well as the mirrors, is another essential parameter for long run and steady operation.

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LBO can also be an outstanding nonlinear crystal which is always applied to the SHG through the NIR to the inexperienced. The DUV laser is often understood by two stages of SFG within the LBO crystals due to the fact there is no period-matching angle for LBO to transform the inexperienced laser at 515 nm or 532 nm into the DUV directly by SHG [sixteen]. Recently, the NSBBF crystal has also shown its prospective to acquire a superior conversion performance from 532 nm to 266 nm. The stroll-off angle and deff on the NSBBF more info are Practically comparable to These of CLBO [seventeen].

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Inside the scientific and industrial programs, the beam top quality in the DUV laser is usually an essential parameter. Especially, the beam quality of the DUV laser radically influences the laser machining benefits. The beam high quality of your DUV laser is set by that of the fundamental laser plus the crystal for your frequency conversion. Recently, a significant-electrical power DUV laser (>ten W) at 258 nm was noted that has a beam excellent of M2 < 1.five, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would result in an even better laser machining result when compared to the prior DUV lasers with more substantial M2.

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Tunable ultraviolet laser supply based upon good-point out dye laser technological innovation and CsLiB6O10 harmonic era

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