Even so, to be able to process the crystal may be very Sophisticated producing strategies are required. For the reason that dawn of this crystal, focusing on this challenge, we are actually the only real business on the globe that may be processed On this crystal.
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In accordance with the evidence-of-principle experiment, the conversion effectiveness of 23% implied the potential for achieving higher-electricity at the next Stokes wavelength on the Raman laser. If your pump laser of 1078 nm may very well be received at the common electricity of fifty W, the output ability of its 2nd Stokes wavelength at 1512 nm can be more than ten W. The design from the Raman laser cavity ought to be optimized to be able to avoid the damage of your M1 and diamond floor.
The typical energy of the NIR laser continue to has the probable to get improved to tens of watts like 70 W [26] In case the double-go configuration could possibly be utilized for that Yb:YAG SCF amplifier stage. For this reason, In the event the conversion performance of 31% from NIR to DUV may be still taken care of at this bigger electrical power ailment, the average output electricity of the DUV laser at 258 nm could possibly be much more than twenty W, which would be described as a extraordinary energy degree to the DUV laser and cause the unanticipated DUV laser machining effects. Furthermore, for top-ability DUV laser, the UV destruction of your nonlinear crystal, such as the Home windows for CLBO crystal as well as mirrors, is yet another significant parameter for long run and stable Procedure.
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LBO is likewise a great nonlinear crystal which is usually placed on the SHG from read more the NIR for the inexperienced. The DUV laser is usually realized by two stages of SFG while in the LBO crystals considering the fact that there isn't any stage-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm on the DUV right by SHG [sixteen]. Just lately, the NSBBF crystal has also demonstrated its likely to get a higher conversion efficiency from 532 nm to 266 nm. The wander-off angle and deff of your NSBBF are Pretty much just like All those of CLBO [seventeen].
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Inside the scientific and industrial programs, the beam top quality in the DUV laser is also an important parameter. Particularly, the beam quality of your DUV laser considerably impacts the laser machining outcomes. The beam high-quality on the DUV laser is determined by that of the elemental laser along with the crystal for your frequency conversion. A short while ago, a large-electrical power DUV laser (>ten W) at 258 nm was noted that has a beam high quality of M2 < 1.five, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would produce a much better laser machining final result in comparison to the past DUV lasers with bigger M2.
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The beam profile demonstrated in Determine 7b shown a great beam good quality as one of the merits of Raman laser, which would be useful to crank out a 193-nm DUV laser with a top quality beam.
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