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We summarized the current improvement standing of the significant-power DUV laser equally in the wavelength of FHG in the 1-μm laser and at 193 nm. The new enhancement of the solid-state/fiber laser, along with the nonlinear optical crystals, prompts not merely the standard power but will also the beam quality (coherence) from the DUV lasers to an unprecedented level.
The key issue of ultraviolet coherent gentle supply largely focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is probably the conditions for frequency transformation, so The expansion, size, destruction resistance, conversion effectiveness and allowable parameter range of nonlinear optical crystal are essential An increasing number of.
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Both equally the 1040 nm and 1078 nm laser originate from 1 twin-wavelength Yb-doped fiber laser. Every laser is amplified by phases of fiber amplifier and Yb-doped materials amplifier, respectively.
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While in the scientific and industrial programs, the beam high quality of the DUV laser can be a crucial parameter. Especially, the beam quality in the DUV laser dramatically impacts the laser machining success. The beam top quality of your DUV laser is determined by that of the basic laser as well as the crystal with the frequency conversion. Not too long ago, a significant-power DUV laser (>10 W) at 258 nm was noted by using a beam high-quality of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would lead to a greater laser machining outcome when compared more info to the former DUV lasers with bigger M2.
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Its UV absorption edge reaches a hundred and eighty nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as huge as that of KDP. CLBO crystals might be developed from the stoichiometric melt with reduced viscosity.
The event of the 193-nm laser was demonstrated by phases of SFG. In order to scale the DUV laser electricity effectively, a whole new thought from the 193-nm DUV laser era is offered dependant on the diamond Raman laser.