5 Simple Statements About CLBO Crystal Explained
5 Simple Statements About CLBO Crystal Explained
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Even so, as a way to procedure the crystal may be very Innovative producing procedures are essential. Since the dawn of the crystal, engaged on this problem, we at the moment are the sole enterprise on this planet that can be processed In this particular crystal.
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We summarized The existing advancement status of your substantial-ability DUV laser the two on the wavelength of FHG of the one-μm laser and at 193 nm. The the latest growth from the stable-state/fiber laser, and also the nonlinear optical crystals, prompts not just the normal power and also the beam high quality (coherence) on the DUV lasers to an unparalleled amount.
The standard electric power on the NIR laser continue to has the opportunity being improved to tens of watts such as 70 W [26] If your double-pass configuration can be utilized with the Yb:YAG SCF amplifier stage. Hence, In case the conversion performance of 31% from NIR to DUV could possibly be nevertheless taken care of at this greater electricity ailment, the typical output power in the DUV laser at 258 nm may be in excess of 20 W, which might become a impressive electricity degree for the DUV laser and produce the unanticipated DUV laser machining effects. What's more, for prime-energy DUV laser, the UV damage with the nonlinear crystal, including the windows for CLBO crystal and also the mirrors, is yet another critical parameter for long-term and steady Procedure.
Then again, the beam quality of this better energy DUV laser would become worse resulting from much more critical thermal and nonlinear consequences. Therefore, the frequency conversion processes must be meticulously built to mitigate the aforementioned consequences. Thus, a higher-electrical power DUV laser with the FHG of 1 μm with a superb beam good quality may be received and will be advantageous for obtaining the shorter wavelength DUV lasers for instance 193 nm by SFG.
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On the other facet, the power scaling on the NIR laser is an additional element to increase the ordinary ability on the 193-nm DUV laser. As a result of lack of the significant-electricity amplification Answer with the NIR laser (as an example at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) may be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also getting relative higher electricity [21]. A short while ago, a diamond Raman laser showed its capacity in accomplishing a substantial ability and a substantial conversion performance at the 1st Stokes from the 1-μm laser [22,23], which implies the possibility to be applied within the 193-nm DUV laser generation due to its high Raman gain and enormous frequency shift.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of your Nd:YAG essential laser wavelength. So as to enrich the problems threshold, lower CLBO surface area roughness, by extremely-precision machining, is necessary. Since the CLBO crystal has quick hydroscopic response and micro scratches in machining, ultra-exact machining on the CLBO crystal can be a hard complex issue.
The beam profile shown in Figure 7b demonstrated a good beam high quality as one of many merits of Raman laser, which might be effective to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals can be developed in the stoichiometric soften with reduced viscosity.
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