The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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All-reliable-point out ultraviolet lasers are actually widely Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of smaller quantity, very long lifetime, significant performance, good beam high quality, large tuning and slim spectral line, etc. Employing significant electrical power close to-infrared coherent light supply as the fundamental frequency supply dependant on nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is viewed as a crucial solution to build the ultraviolet coherent light-weight source.
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According to the evidence-of-theory experiment, the conversion performance of 23% implied the possibility of attaining higher-electricity at the second Stokes wavelength of your Raman laser. Should the pump laser of 1078 nm may be acquired at the normal electricity of fifty W, the output electricity of its 2nd Stokes wavelength at 1512 nm could possibly be a lot more than 10 W. The look from the Raman laser cavity really should be optimized in an effort to avoid the harm of your M1 and diamond surface area.
As an example, The present concave OC could be replaced by a plane mirror which could mitigate the power density within the surface area of M1 and also the diamond. In addition, working with higher damage threshold coatings for M1 and diamond would also Increase the output ability without any damages. Then, the NIR laser on the 2nd Stokes wavelength could be large ample, as well as its excellent beam top quality, to generate the ultimate DUV laser at 193 nm which has a significant regular energy.
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Each the 1040 nm and 1078 nm laser come from one dual-wavelength Yb-doped fiber laser. Each laser is amplified by stages of fiber amplifier and Yb-doped elements amplifier, respectively.
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Within the scientific and industrial applications, the beam good quality of the DUV laser is additionally a crucial parameter. Especially, the beam top quality from the DUV laser considerably impacts the laser machining benefits. The beam high-quality from the DUV laser is set by that of the basic laser as well as crystal for the frequency conversion. Lately, a substantial-electric power DUV laser (>ten W) at 258 nm was described having a beam high-quality of M2 < one.five, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would produce a better laser machining outcome compared to the former DUV lasers with larger sized M2.
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The conversion efficiency from essential NIR to DUV is from five% to 36% in accordance with the described leads to Desk one. Increasing the conversion effectiveness will reduce the burden on the design and set up of the basic laser amplifier in addition to the electric energy consumption. A very good beam high-quality of the basic laser may also add to your escalating from the conversion efficiency in addition to the right electricity intensity with the NIR and eco-friendly laser in the SHG and FHG course of action, respectively. The very best conversion efficiencies from NIR to environmentally friendly and green to DUV laser by usage of CLBO crystal are 70% and close to fifty%, respectively [twelve], which corresponds on the conversion performance of 35% from fundamental to DUV.
The event of your 193-nm laser was demonstrated by levels of SFG. So that you can scale the DUV laser electric power properly, a brand new idea from the 193-nm DUV laser technology is presented depending on the diamond Raman laser.