Having said that, so as to approach the crystal may be very State-of-the-art production procedures are essential. Considering that the dawn of this crystal, engaged on this problem, we are now the one organization on earth which might be processed With this crystal.
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We summarized The existing development position of the high-power DUV laser the two at the wavelength of FHG from the one-μm laser and at 193 nm. The latest progress on the stable-condition/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the common power and also the beam quality (coherence) of your DUV lasers to an unparalleled amount.
The average power of the NIR laser nonetheless has the prospective being enhanced to tens of watts for instance 70 W [26] In case the double-go configuration may very well be used with the Yb:YAG SCF amplifier phase. That's why, Should the conversion effectiveness of 31% from NIR to DUV could possibly be nevertheless maintained at this bigger electric power problem, the average output electric power of the DUV laser at 258 nm might be in excess of twenty W, which would be considered a remarkable energy level with the DUV laser and produce the unanticipated DUV laser machining outcomes. In addition, for prime-electricity DUV laser, the UV harm of your nonlinear crystal, including the Home windows for CLBO crystal along with the mirrors, is yet another crucial parameter for long-term and steady Procedure.
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On another aspect, the ability scaling of your NIR laser is another factor to raise the typical ability of the 193-nm DUV laser. Because of the not enough the large-energy amplification Alternative with the NIR laser (for instance at 1553 nm), nonlinear frequency processes for example optical parameter oscillation (OPO) could possibly be applied to create a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also acquiring relative larger electrical power [21]. A short while ago, a diamond Raman laser showed its capability in attaining a substantial electric power website in addition to a significant conversion performance with the 1st Stokes of your 1-μm laser [22,23], which suggests the likelihood to generally be applied during the 193-nm DUV laser era as a consequence of its large Raman get and enormous frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of your Nd:YAG basic laser wavelength. So as to enrich the destruction threshold, low CLBO surface roughness, by extremely-precision machining, is necessary. As the CLBO crystal has uncomplicated hydroscopic response and micro scratches in machining, extremely-exact machining with the CLBO crystal is actually a challenging specialized issue.
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