The smart Trick of CLBO Crystal That Nobody is Discussing

The smart Trick of CLBO Crystal That Nobody is Discussing

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All-strong-state ultraviolet lasers are already widely used in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of compact volume, extended existence, significant performance, great beam good quality, broad tuning and slim spectral line, and so forth. Employing high electricity in close proximity to-infrared coherent gentle source as the fundamental frequency source depending on nonlinear tuning technologies, making ultraviolet coherent radiation by multistage frequency conversion is viewed as a significant approach to produce the ultraviolet coherent light source.

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The common ability with the NIR laser continue to has the opportunity to be improved to tens of watts which include 70 W [26] In case the double-go configuration could possibly be utilized for your Yb:YAG SCF amplifier stage. Hence, In the event the conversion efficiency of 31% from NIR to DUV could possibly be nonetheless preserved at this better electrical power condition, the average output ability of the DUV laser at 258 nm may very well be in excess of twenty W, which might become a amazing ability degree to the DUV laser and lead to the unanticipated DUV laser machining results. Also, for high-energy DUV laser, the UV destruction with the nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is another significant parameter for long run and steady operation.

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LBO is likewise a fantastic nonlinear crystal which is always applied to the SHG from the NIR here into the eco-friendly. The DUV laser is frequently realized by two phases of SFG in the LBO crystals due to the fact there's no period-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV instantly by SHG [sixteen]. Recently, the NSBBF crystal has also shown its possible to obtain a higher conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff of the NSBBF are Nearly similar to These of CLBO [17].

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Within the scientific and industrial apps, the beam good quality from the DUV laser can be a crucial parameter. Notably, the beam quality with the DUV laser significantly impacts the laser machining results. The beam high quality in the DUV laser is set by that of the basic laser as well as the crystal for that frequency conversion. Recently, a large-electric power DUV laser (>ten W) at 258 nm was reported having a beam excellent of M2 < one.five, which was generated by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring on a much better laser machining consequence compared to the preceding DUV lasers with greater M2.

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In addition, combining the solid-condition laser with other nonlinear system such as stimulated Raman scattering, NIR lasers may be reached at new wavelengths with significant electric power and significant beam top quality, which was examined with the proof-of-principle experiment. This Raman laser scheme supplies a completely new path to the significant-electric power DUV laser, Specially at the wavelength of 193 nm.

The beam profile demonstrated in Determine 7b demonstrated a fantastic beam high quality as among the list of deserves of Raman laser, which might be valuable to produce a 193-nm DUV laser with a high quality beam.

Its UV absorption edge reaches one hundred eighty nm. The efficient nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as substantial as that of KDP. CLBO crystals may be developed from the stoichiometric soften with lessen viscosity.

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