The 2-Minute Rule for CLBO Crystal
The 2-Minute Rule for CLBO Crystal
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As an example, The existing concave OC could be replaced by a aircraft mirror which could mitigate the facility density within the area of M1 plus the diamond. Additionally, utilizing significant injury threshold coatings for M1 and diamond would also Increase the output energy without any damages. Then, the NIR laser for the 2nd Stokes wavelength can be substantial more than enough, along with its excellent beam excellent, to crank out the ultimate DUV laser at 193 nm that has a superior ordinary ability.
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The two the 1040 nm and 1078 nm laser come from a single dual-wavelength Yb-doped fiber laser. Every single laser is amplified by stages of fiber amplifier and Yb-doped supplies amplifier, respectively.
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In the scientific and industrial programs, the beam top quality in the DUV laser is additionally a vital parameter. Notably, the beam good quality on the DUV laser drastically affects the laser machining success. The beam excellent in the DUV laser is decided by that of the elemental laser along with the crystal for your frequency conversion. Lately, a superior-electric power DUV laser (>10 W) at 258 nm was reported that has a beam top quality of M2 < one.5, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring about a far better laser machining outcome as compared to the prior DUV lasers with much larger M2.
The heartbeat duration of the 2nd Stokes gentle was shortened to 5 ns as revealed in Determine 7a, just one-shot picture through the oscilloscope, which happens to be a typical phenomenon in Raman laser [44] while the heart beat period of your pump laser was ten ns.
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The conversion effectiveness from basic NIR to DUV here is from 5% to 36% in accordance with the documented results in Table one. Rising the conversion efficiency will decrease the stress on the design and set up of the elemental laser amplifier plus the electric electricity use. An excellent beam high-quality of the elemental laser may also lead to your growing on the conversion performance as well as the appropriate electricity intensity on the NIR and green laser inside the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [twelve], which corresponds into the conversion performance of 35% from elementary to DUV.
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