5 Easy Facts About CLBO Crystal Described
5 Easy Facts About CLBO Crystal Described
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All-good-condition ultraviolet lasers have already been commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of modest quantity, lengthy daily life, significant efficiency, excellent beam good quality, extensive tuning and narrow spectral line, etcetera. Making use of higher electric power around-infrared coherent light-weight resource as the fundamental frequency supply based on nonlinear tuning know-how, creating ultraviolet coherent radiation by multistage frequency conversion is viewed as an important method to establish the ultraviolet coherent light-weight supply.
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We summarized the current enhancement standing in the higher-ability DUV laser equally with the wavelength of FHG from the 1-μm laser and at 193 nm. The new advancement of your sound-state/fiber laser, as well as the nonlinear optical crystals, prompts not simply the common power and also the beam excellent (coherence) from the DUV lasers to an unprecedented amount.
The key issue of ultraviolet coherent mild source mostly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the situations for frequency transformation, so the growth, measurement, damage resistance, conversion efficiency and allowable parameter choice of nonlinear optical crystal are essential A lot more.
Then again, the beam high quality of the greater ability DUV laser would grow to be even worse due to far more major thermal and nonlinear effects. Therefore, the frequency conversion processes must be meticulously built to mitigate the aforementioned consequences. Thus, a large-power DUV laser with the FHG of one μm with a fantastic beam high-quality could be obtained and will be beneficial for obtaining the shorter wavelength DUV lasers for example 193 nm by SFG.
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On another facet, the power scaling with the NIR laser is another part to improve the regular power on the 193-nm DUV laser. Because of the insufficient the large-electric click here power amplification Answer with the NIR laser (for example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength and obtaining relative larger energy [21]. Not too long ago, a diamond Raman laser showed its capacity in attaining a higher electricity and also a superior conversion performance at the 1st Stokes from the one-μm laser [22,23], which means the chance to be used during the 193-nm DUV laser technology thanks to its large Raman obtain and huge frequency shift.
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Furthermore, combining the sound-condition laser with other nonlinear approach such as stimulated Raman scattering, NIR lasers may very well be accomplished at new wavelengths with higher ability and superior beam excellent, which was examined from the evidence-of-basic principle experiment. This Raman laser scheme offers a whole new route to the high-power DUV laser, Primarily on the wavelength of 193 nm.
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The conversion efficiency from elementary NIR to DUV is from 5% to 36% based on the noted brings about Table one. Expanding the conversion efficiency will decrease the load on the look and setup of the elemental laser amplifier in addition to the electric powered energy intake. A very good beam top quality of the basic laser will likely add towards the rising with the conversion performance as well as the appropriate energy intensity from the NIR and eco-friendly laser inside the SHG and FHG method, respectively. The highest conversion efficiencies from NIR to eco-friendly and green to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [12], which corresponds towards the conversion effectiveness of 35% from basic to DUV.
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