The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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Even so, as a way to approach the crystal is incredibly Superior producing strategies are needed. Considering that the dawn of this crystal, engaged on this challenge, we are actually the only real enterprise on this planet that can be processed In this particular crystal.
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Based on the proof-of-basic principle experiment, the conversion performance of 23% implied the opportunity of attaining significant-electric power at the next Stokes wavelength from the Raman laser. If the pump laser of 1078 nm could be received at the typical power of fifty W, the output energy of its 2nd Stokes wavelength at 1512 nm can be more than ten W. The design with the Raman laser cavity needs to be optimized in order to stay away from the damage on the M1 and diamond area.
The standard electrical power of your NIR laser continue to has the potential being enhanced to tens of watts including 70 W [26] Should the double-pass configuration could possibly be used for that Yb:YAG SCF amplifier phase. Therefore, In the event the conversion efficiency of 31% from NIR to DUV may very well be however managed at this higher energy problem, the common output electricity on the DUV laser at 258 nm may very well be in excess of twenty W, which would be described as a extraordinary electric power stage for your DUV laser and result in the unanticipated DUV laser machining results. What's more, for prime-electrical power DUV laser, the UV damage of your nonlinear crystal, including the windows for CLBO crystal plus the mirrors, is another critical parameter for long-term and steady operation.
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Both equally the 1040 nm and 1078 nm laser come from one particular dual-wavelength Yb-doped fiber laser. Each individual laser is amplified by stages of fiber amplifier and Yb-doped products amplifier, respectively.
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Within the scientific and industrial purposes, the beam high quality of your DUV laser is likewise a vital parameter. Especially, the beam high-quality of your DUV laser dramatically has an effect on the laser machining benefits. The beam quality on the DUV laser is decided by that of the fundamental laser plus the crystal for the frequency conversion. Just lately, a high-electrical power DUV laser (>ten W) at 258 nm was described with a beam top quality of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring on a greater laser machining outcome when compared with the past DUV lasers with much larger M2.
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Also, combining the solid-state laser with other nonlinear procedure for example stimulated Raman scattering, NIR lasers may very well be reached at new wavelengths with significant electric power and superior beam good quality, which was analyzed from the proof-of-basic principle experiment. This Raman laser plan delivers a different path to the large-electrical power DUV laser, Specifically in the wavelength of 193 nm.
The beam profile shown in Determine 7b shown a very good beam quality as among the merits of Raman laser, which might be valuable to crank out a 193-nm DUV laser with a high quality beam.
The conversion effectiveness from fundamental NIR to DUV is from five% to 36% according to the described results in Desk 1. Rising the conversion efficiency will decrease the stress on the look and setup of the basic laser amplifier as well as the electrical ability consumption. A superb beam quality of the fundamental laser may even add to the growing of the conversion performance in addition to the check here appropriate electricity intensity on the NIR and inexperienced laser from the SHG and FHG system, respectively. The best conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds towards the conversion efficiency of 35% from essential to DUV.
The development of the 193-nm laser was demonstrated by levels of SFG. To be able to scale the DUV laser electric power successfully, a whole new concept in the 193-nm DUV laser technology is introduced according to the diamond Raman laser.