5 Simple Statements About CLBO Crystal Explained
5 Simple Statements About CLBO Crystal Explained
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All-solid-state ultraviolet lasers are already commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of little quantity, extended lifetime, significant effectiveness, excellent beam top quality, wide tuning and slender spectral line, and so forth. Utilizing superior energy in close proximity to-infrared coherent gentle supply as the fundamental frequency resource based upon nonlinear tuning technological know-how, making ultraviolet coherent radiation by multistage frequency conversion is viewed as a vital approach to establish the ultraviolet coherent light supply.
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In accordance with the proof-of-principle experiment, the conversion performance of 23% implied the possibility of reaching higher-energy at the next Stokes wavelength with the Raman laser. Should the pump laser of 1078 nm might be obtained at the standard ability of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm might be more than ten W. The look on the Raman laser cavity ought to be optimized in order to stay away from the destruction in the M1 and diamond floor.
The standard electrical power from the NIR laser however has the prospective to get improved to tens of watts for example 70 W [26] if the double-move configuration can be utilized for your Yb:YAG SCF amplifier stage. Hence, if the conversion performance of 31% from NIR to DUV can be still preserved at this greater power affliction, the typical output electric power of the DUV laser at 258 nm could be greater than 20 W, which would be considered a amazing power level for your DUV laser and cause the unanticipated DUV laser machining effects. What's more, for top-ability DUV laser, the UV harm from the nonlinear crystal, including the Home windows for CLBO crystal and also the mirrors, is another crucial parameter for long run and steady operation.
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LBO is likewise a wonderful nonlinear crystal which is often placed on the SHG from the NIR towards the green. The DUV laser is normally realized by two stages of SFG in the LBO crystals considering the fact that there is absolutely no period-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV straight by SHG [sixteen]. Recently, the NSBBF crystal has also revealed its probable to get a higher conversion performance from 532 nm to 266 nm. The stroll-off angle and deff of the NSBBF are Virtually similar to Those people of CLBO [17].
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics on the Nd:YAG fundamental laser wavelength. To be able to improve the damage threshold, small CLBO floor roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has straightforward hydroscopic reaction get more info and micro scratches in machining, extremely-precise machining in the CLBO crystal is really a hard complex difficulty.
The beam profile demonstrated in Determine 7b shown an excellent beam high-quality as on the list of deserves of Raman laser, which might be effective to generate a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as substantial as that of KDP. CLBO crystals is usually developed with the stoichiometric melt with decreased viscosity.
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