The Ultimate Guide To CLBO Crystal
The Ultimate Guide To CLBO Crystal
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All-sound-point out ultraviolet lasers have already been greatly Utilized in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of smaller quantity, extensive life, substantial effectiveness, good beam high quality, large tuning and slender spectral line, etcetera. Making use of superior power in close proximity to-infrared coherent light supply as the fundamental frequency source determined by nonlinear tuning technological innovation, building ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital method to produce the ultraviolet coherent mild supply.
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According to the evidence-of-principle experiment, the conversion effectiveness of 23% implied the potential of accomplishing significant-electrical power at the second Stokes wavelength of your Raman laser. In case the pump laser of 1078 nm might be obtained at the standard electrical power of 50 W, the output ability of its 2nd Stokes wavelength at 1512 nm can be greater than ten W. The design of the Raman laser cavity really should be optimized in order to stay away from the injury with the M1 and diamond surface area.
For example, The existing concave OC could get replaced by a plane mirror which could mitigate the power density within the floor of M1 along with the diamond. Moreover, making use of significant destruction threshold coatings for M1 and diamond would also improve the output power with no damages. Then, the NIR laser in the 2nd Stokes wavelength may be significant ample, in addition to its great beam top quality, to crank out the ultimate DUV laser at 193 nm with a large average electric power.
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From the scientific and industrial programs, the beam top quality of your DUV laser can be a very important parameter. Especially, the beam quality of the DUV laser significantly influences the laser machining effects. The beam high quality of your DUV laser is decided by that of the fundamental laser and the crystal for your frequency conversion. Not long ago, a superior-energy DUV laser (>10 W) at 258 nm was described with a beam top quality of M2 < 1.5, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in an improved laser machining end result as compared to the preceding DUV lasers with bigger M2.
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The beam profile shown in Determine 7b shown a great beam quality as among the list of deserves of Raman laser, which would be valuable to generate a 193-nm DUV laser with a high quality beam.
The conversion effectiveness from essential NIR to DUV is from 5% to 36% according to the claimed leads to Table one. Expanding the conversion efficiency will reduce the load on the design and set up of the elemental laser amplifier as well as the electric electricity intake. A very good beam excellent of the elemental laser can even add to the growing in the conversion effectiveness along with the suitable electricity depth on the NIR and inexperienced laser while in the SHG and FHG course of action, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds to your conversion effectiveness of 35% from elementary to DUV.
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