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As an illustration, The present concave OC could be replaced by a plane mirror which could mitigate the facility density about the surface area of M1 along with the diamond. Additionally, utilizing superior hurt threshold coatings for M1 and diamond would also improve the output electricity without any damages. Then, the NIR laser at the 2nd Stokes wavelength may very well be large more than enough, along with its superior beam high quality, to crank out the ultimate DUV laser at 193 nm using a significant ordinary energy.
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Both equally the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Each laser is amplified by levels of fiber amplifier and Yb-doped elements amplifier, respectively.
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From the scientific and industrial programs, the beam top quality in the DUV laser is additionally a crucial parameter. Specifically, the beam high quality of the DUV laser radically impacts the laser machining results. The beam excellent in the DUV laser is decided by that of the basic laser and also the crystal for the frequency conversion. Not long ago, a large-ability DUV laser (>ten W) at 258 nm was reported that has a beam quality of M2 < 1.five, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would result in an improved laser machining final result when compared with the former DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics on the Nd:YAG basic laser wavelength. In an effort to increase the injury threshold, reduced CLBO area roughness, by extremely-precision machining, is needed. As the CLBO crystal has easy hydroscopic response and micro scratches in machining, extremely-precise machining of the CLBO crystal is usually a hard technical trouble.
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Its UV absorption edge reaches 180 nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals is usually grown from the stoichiometric soften with lower viscosity.
The development with the 193-nm laser was demonstrated by stages of SFG. So that you can scale the DUV laser electrical power correctly, a fresh strategy from the 193-nm DUV laser era is offered dependant on the diamond Raman laser.