The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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The normal electrical power with the NIR laser continue to has the prospective to get enhanced to tens of watts for example 70 W [26] If your double-go configuration could be used for your Yb:YAG SCF amplifier stage. Therefore, In case the conversion performance of 31% from NIR to DUV might be still maintained at this higher electricity issue, the normal output energy of your DUV laser at 258 nm could be greater than 20 W, which might be considered a extraordinary electric power degree for that DUV laser and result in the unanticipated DUV laser machining final results. In addition, for high-power DUV laser, the UV injury from the nonlinear crystal, including the windows for CLBO crystal along with the mirrors, is yet another crucial parameter for lasting and stable operation.
On the other hand, the beam high-quality of this greater energy DUV laser would grow to be worse resulting from far more major thermal and nonlinear results. Hence, the frequency conversion processes need to be cautiously meant to mitigate the aforementioned consequences. So, a significant-power DUV laser in the FHG of 1 μm with an excellent beam good quality may very well be attained and will be effective for acquiring the shorter wavelength DUV lasers for instance 193 nm by SFG.
LBO is additionally a wonderful nonlinear crystal which is often placed on the SHG in the NIR towards the inexperienced. The DUV laser is usually realized by two stages of SFG during the LBO crystals considering the fact that there's no section-matching angle for LBO to convert the inexperienced laser at 515 nm or 532 nm towards the DUV straight by SHG [sixteen]. Just lately, the NSBBF crystal has also shown its opportunity to get a higher conversion effectiveness from 532 nm to 266 nm. The stroll-off angle and deff in the NSBBF are Nearly comparable to These of CLBO [17].
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Inside the scientific and industrial apps, the beam top quality of the DUV laser can also be a very important parameter. Specifically, the beam high quality on the DUV laser radically influences the laser machining benefits. The beam top quality from the DUV laser is decided by that of the fundamental laser and also the crystal with the frequency conversion. Recently, a high-electric power DUV laser (>ten W) at 258 nm was claimed that has a beam high quality of M2 < 1.five, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would produce a better laser machining consequence in comparison with the prior DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics in the Nd:YAG basic laser wavelength. So as to increase the injury threshold, minimal CLBO area roughness, by ultra-precision machining, is needed. Because the CLBO crystal has straightforward hydroscopic reaction and micro scratches in machining, ultra-precise machining in the CLBO crystal is a complicated complex dilemma.
The beam profile revealed in Figure 7b demonstrated an excellent beam high-quality as one of many merits of Raman laser, which would be beneficial to generate 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 2 times as large as that of KDP. CLBO crystals is usually developed with the stoichiometric soften with reduced viscosity.
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