Not known Factual Statements About CLBO Crystal
Not known Factual Statements About CLBO Crystal
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All-solid-condition ultraviolet lasers have been extensively Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of smaller volume, prolonged daily life, significant performance, fantastic beam top quality, extensive tuning and slender spectral line, and many others. Employing substantial electrical power around-infrared coherent mild supply as the fundamental frequency supply according to nonlinear tuning technology, building ultraviolet coherent radiation by multistage frequency conversion is considered to be an important strategy to produce the ultraviolet coherent light-weight resource.
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We summarized The present enhancement position with the higher-electricity DUV laser each for the wavelength of FHG from the one-μm laser and at 193 nm. The the latest advancement with the sound-point out/fiber laser, in addition to the nonlinear optical crystals, prompts not only the common power but also the beam high-quality (coherence) of the DUV lasers to an unparalleled degree.
As an example, the current concave OC could get replaced by a plane mirror which could mitigate the facility density over the surface area of M1 and also the diamond. In addition, making use of large injury threshold coatings for M1 and diamond would also improve the output ability with no damages. Then, the NIR laser at the 2nd Stokes wavelength can be large enough, and also its great beam good quality, to generate the final DUV laser at 193 nm that has a high common electric power.
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Both the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Each and every laser is amplified by stages of fiber amplifier and Yb-doped supplies amplifier, respectively.
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Inside the scientific and industrial apps, the beam high-quality of the DUV laser is also an important parameter. Particularly, the beam high-quality with the DUV laser considerably impacts the laser machining results. The beam high-quality on the DUV laser is determined by that of the basic laser and also the crystal with the frequency conversion. Just lately, a substantial-electricity DUV laser (>10 W) at 258 nm was claimed by using a beam top quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would result in a better laser machining consequence as compared to the previous DUV lasers with greater M2.
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Additionally, combining the reliable-condition laser with other nonlinear procedure which include stimulated Raman scattering, NIR lasers could be reached at new wavelengths with high electrical power and superior beam high quality, which was examined because of the evidence-of-basic principle experiment. This Raman laser plan provides a brand new path to the high-electrical power DUV laser, Primarily at the wavelength of 193 nm.
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The conversion performance from elementary NIR to DUV is from 5% to 36% in accordance with the described results in Table one. Escalating the conversion performance will reduce the load on the look and setup of the basic laser amplifier and also the electric electric power consumption. A superb beam quality of the basic laser will likely contribute for the expanding of the conversion efficiency and also the suitable electric power depth of your NIR and more info environmentally friendly laser within the SHG and FHG course of action, respectively. The best conversion efficiencies from NIR to environmentally friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around fifty%, respectively [twelve], which corresponds into the conversion performance of 35% from elementary to DUV.
The development of your 193-nm laser was demonstrated by levels of SFG. As a way to scale the DUV laser power properly, a new thought on the 193-nm DUV laser technology is presented depending on the diamond Raman laser.