The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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Nonetheless, as a way to procedure the crystal may be very Superior producing techniques are needed. For the reason that dawn of this crystal, engaged on this challenge, we are actually the only enterprise on the planet which might be processed On this crystal.
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We summarized The existing advancement status on the large-energy DUV laser both of those with the wavelength of FHG of the one-μm laser and at 193 nm. The recent progress in the solid-state/fiber laser, and also the nonlinear optical crystals, prompts not merely the standard energy and also the beam quality (coherence) in the DUV lasers to an unparalleled amount.
The standard electric power on the NIR laser nonetheless has the possible to be enhanced to tens of watts including 70 W [26] if the double-move configuration might be used for that Yb:YAG SCF amplifier phase. That's why, When the conversion efficiency of 31% from NIR to DUV could be however maintained at this better energy affliction, the standard output electric power of the DUV laser at 258 nm may be much more than twenty W, which would be a outstanding electric power amount with the DUV laser and lead to the unanticipated DUV laser machining outcomes. Moreover, for high-electricity DUV laser, the UV problems of your nonlinear crystal, such as the windows for CLBO crystal and the mirrors, is an additional vital parameter for long lasting and steady Procedure.
On the other hand, the beam top quality of the better electricity DUV laser would become worse because of a lot more significant thermal and nonlinear results. Consequently, the frequency conversion processes should be thoroughly built to mitigate the aforementioned outcomes. As a result, a substantial-power DUV laser at the FHG of one μm with a superb beam high quality could be attained and can be beneficial for acquiring the shorter wavelength DUV lasers like 193 nm by SFG.
LBO is usually a great nonlinear crystal which is always placed on the SHG from the NIR to the green. The DUV laser is usually understood by two levels of SFG inside the LBO crystals considering the fact that there isn't any phase-matching angle for LBO to transform the green laser at 515 nm or 532 nm for the DUV immediately by SHG [16]. Not too long ago, the NSBBF crystal has also proven its prospective to obtain a high conversion performance from 532 nm to 266 nm. The wander-off angle and deff in the NSBBF are Virtually similar to those of CLBO [17].
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In addition, combining the good-state laser with other nonlinear course of action like stimulated Raman scattering, NIR lasers may be achieved at new wavelengths with large electric power and high beam high quality, which was examined via the evidence-of-basic principle experiment. This Raman laser plan provides a brand new path to the large-electricity DUV laser, Primarily within the wavelength of 193 nm.
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The conversion performance from basic NIR to DUV is from five% to 36% according to the described ends in Table 1. Increasing the conversion effectiveness will lessen the burden on the look here and set up of the fundamental laser amplifier together with the electric electricity use. A fantastic beam high quality of the basic laser can even add towards the rising with the conversion performance in addition to the appropriate electricity depth with the NIR and environmentally friendly laser during the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by use of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds to the conversion performance of 35% from elementary to DUV.
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