What Does CLBO Crystal Mean?
What Does CLBO Crystal Mean?
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All-good-point out ultraviolet lasers are actually broadly used in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of compact volume, extended lifetime, higher effectiveness, good beam good quality, extensive tuning and slender spectral line, and so on. Employing higher electric power near-infrared coherent light supply as the basic frequency supply according to nonlinear tuning technology, producing ultraviolet coherent radiation by multistage frequency conversion is thought to be a very important method to produce the ultraviolet coherent light-weight source.
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We summarized the current development standing of the higher-electric power DUV laser equally for the wavelength of FHG of your 1-μm laser and at 193 nm. The the latest progress from the stable-state/fiber laser, together with the nonlinear optical crystals, prompts not just the normal electrical power but will also the beam high-quality (coherence) with the DUV lasers to an unparalleled level.
For example, The existing concave OC could get replaced by a plane mirror which could mitigate the facility density to the surface area of M1 and the diamond. Moreover, making use of large damage threshold coatings for M1 and diamond would also improve the output electric power without any damages. Then, the NIR laser for the 2nd Stokes wavelength could possibly be superior ample, as well as its excellent beam excellent, to crank out the final DUV laser at 193 nm with a significant ordinary energy.
Then again, the beam high quality of the higher electricity DUV laser would become even worse as a consequence of a lot more major thermal and nonlinear results. For this reason, the frequency conversion procedures need to be cautiously created to mitigate the aforementioned outcomes. Consequently, a superior-power DUV laser within the FHG of one μm with a very good beam quality might be acquired and will be advantageous for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
Both of those the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Every laser is amplified by stages of fiber amplifier and Yb-doped supplies amplifier, respectively.
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Moreover, combining the reliable-point out laser with other nonlinear method which include stimulated Raman scattering, NIR lasers could possibly be obtained at new wavelengths with large electric power and high beam top quality, which was examined because of the evidence-of-basic principle experiment. This Raman laser plan presents a brand new path to the high-electric power DUV laser, Primarily at the wavelength of 193 nm.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the described results in Table one. Growing the conversion effectiveness will reduce the load on the look and setup of the basic laser amplifier along with the get more info electrical power intake. A very good beam top quality of the elemental laser will also lead to your rising of the conversion efficiency and also the right ability depth of the NIR and green laser inside the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds towards the conversion efficiency of 35% from essential to DUV.
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