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The key difficulty of ultraviolet coherent gentle supply mostly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the situations for frequency transformation, so the growth, sizing, damage resistance, conversion performance and allowable parameter choice of nonlinear optical crystal are expected more and more.
Alternatively, the beam high quality of the better ability DUV laser would grow to be even worse because of far more major thermal and nonlinear effects. Consequently, the frequency conversion procedures must be diligently designed to mitigate the aforementioned results. Hence, a higher-power DUV laser with the FHG of one μm with a fantastic beam quality might be obtained and will be advantageous for getting the shorter wavelength DUV lasers such as 193 nm by SFG.
LBO is usually a fantastic nonlinear crystal which is often applied to the SHG through the NIR to the eco-friendly. The DUV laser is frequently understood by two levels of SFG within the LBO crystals due to the fact there is no phase-matching angle for LBO to transform the green laser at 515 nm or 532 nm to the DUV directly by SHG [sixteen]. Recently, the NSBBF crystal has also revealed its possible to obtain a high conversion performance from 532 nm to 266 nm. The wander-off angle and deff on the NSBBF are Practically much like Individuals of CLBO [17].
On one other aspect, the power scaling of the NIR laser is another component to enhance the regular energy with the 193-nm DUV laser. Due to insufficient the high-electric power amplification Resolution from the NIR laser (such as at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) may be placed on create a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with acquiring relative bigger ability [21]. Lately, a diamond Raman laser showed its means in accomplishing a large ability in addition to a large conversion efficiency within the 1st Stokes with the 1-μm laser [22,23], which suggests the chance to be utilized while in the 193-nm DUV laser technology thanks to its substantial Raman attain and enormous frequency shift.
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Tunable ultraviolet laser source dependant on good-condition dye laser technological innovation and CsLiB6O10 harmonic generation
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This cookie is utilized to history the enter contents and also the progress of the enter variety. It doesn't retail outlet any particular facts.