All-reliable-condition ultraviolet lasers happen to be extensively used in the fields of mechanical flaw detection, lithography, micromachining and drugs for the benefits of smaller quantity, extensive lifestyle, large effectiveness, excellent beam top quality, wide tuning and slim spectral line, and many others. Employing large energy around-infrared coherent gentle supply as the fundamental frequency resource determined by nonlinear tuning technology, building ultraviolet coherent radiation by multistage frequency conversion is viewed as a very important strategy to develop the ultraviolet coherent mild resource.
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According to the proof-of-basic principle experiment, the conversion efficiency of 23% implied the potential for acquiring large-ability at the second Stokes wavelength in the Raman laser. If your pump laser of 1078 nm may be attained at the average electrical power of 50 W, the output ability of its 2nd Stokes wavelength at 1512 nm can be much more than ten W. The design from the Raman laser cavity ought to be optimized to be able to steer clear of the problems on the M1 and diamond surface.
The average ability with the NIR laser however has the likely for being enhanced to tens of watts for instance 70 W [26] When the double-go configuration may very well be used to the Yb:YAG SCF amplifier phase. For this reason, In case the conversion effectiveness of 31% from NIR to DUV could possibly be still preserved at this greater ability situation, the standard output electricity from the DUV laser at 258 nm can be over twenty W, which might be a exceptional electric power amount with the DUV laser and lead to the unanticipated DUV laser machining success. What's more, for high-energy DUV laser, the UV injury in the nonlinear crystal, including the windows for CLBO crystal as well as mirrors, is another important parameter for long-term and stable Procedure.
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LBO is usually a fantastic nonlinear crystal which is often applied to the SHG through the NIR into the inexperienced. The DUV laser will likely be realized by two stages of SFG inside the LBO crystals since there isn't any stage-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm for the DUV specifically by SHG [sixteen]. Not long ago, the NSBBF crystal has also demonstrated its potential to obtain a substantial conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff on the NSBBF are Just about comparable to These of CLBO [17].
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Tunable ultraviolet laser source based on strong-state dye laser engineering and CsLiB6O10 harmonic generation
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