Indicators on CLBO Crystal You Should Know
Indicators on CLBO Crystal You Should Know
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All-sound-state ultraviolet lasers have already been greatly used in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact quantity, prolonged lifetime, substantial efficiency, great beam high-quality, large tuning and slim spectral line, and many others. Making use of higher power in the vicinity of-infrared coherent mild resource as the basic frequency resource based upon nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is considered an essential technique to create the ultraviolet coherent gentle resource.
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We summarized The existing improvement standing on the high-ability DUV laser equally within the wavelength of FHG from the 1-μm laser and at 193 nm. The modern progress with the good-point out/fiber laser, along with the nonlinear optical crystals, prompts not simply the standard power but in addition the beam high-quality (coherence) from the DUV lasers to an unprecedented degree.
For example, The existing concave OC could get replaced by a plane mirror which could mitigate the facility density within the floor of M1 along with the diamond. In addition, using significant damage threshold coatings for M1 and diamond would also Increase the output electrical power with none damages. Then, the NIR laser on the 2nd Stokes wavelength could be superior ample, in addition to its fantastic beam high quality, to make the ultimate DUV laser at 193 nm having a high common ability.
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Equally the 1040 nm and 1078 nm laser originate from a person twin-wavelength Yb-doped fiber laser. Every single laser is amplified by stages of fiber amplifier and Yb-doped materials amplifier, respectively.
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Within the scientific and industrial applications, the beam high quality from the DUV laser can also be an essential parameter. Especially, the beam quality in the DUV laser drastically affects the laser machining success. The beam excellent in the DUV laser is decided by that of the basic laser and also the crystal for that frequency conversion. Not long ago, a large-power DUV laser (>10 W) at 258 nm was claimed using a beam high-quality of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring on a greater laser machining end result compared to the earlier DUV lasers with much larger M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics from the Nd:YAG fundamental laser wavelength. In order to enhance the destruction threshold, small CLBO floor roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has simple hydroscopic reaction and micro scratches in machining, ultra-specific machining on the CLBO crystal is actually a tricky specialized problem.
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The conversion efficiency from elementary NIR to DUV is from 5% to 36% in accordance with the documented brings about Table one. Increasing the conversion effectiveness will lessen the burden on the design and set up of the fundamental laser amplifier plus the electric powered electrical power intake. A fantastic beam high quality of the basic laser can even add to the escalating with the conversion performance and the appropriate energy intensity in the NIR and eco-friendly laser inside the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and about fifty%, respectively [twelve], which corresponds on the conversion effectiveness of 35% from fundamental to DUV.
The development of the 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser electric power successfully, a different idea on the 193-nm DUV laser technology is presented determined by the diamond Raman laser.