Not known Factual Statements About CLBO Crystal
Not known Factual Statements About CLBO Crystal
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All-solid-point out ultraviolet lasers have been extensively used in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of compact quantity, extended everyday living, superior effectiveness, very good beam high quality, wide tuning and slim spectral line, and so on. Employing substantial electricity around-infrared coherent light supply as the fundamental frequency supply depending on nonlinear tuning engineering, building ultraviolet coherent radiation by multistage frequency conversion is considered an essential technique to produce the ultraviolet coherent light-weight source.
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We summarized The existing enhancement position on the large-energy DUV laser both of those on the wavelength of FHG with the 1-μm laser and at 193 nm. The new advancement of your sound-point out/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the typical electric power but also the beam top quality (coherence) with the DUV lasers to an unprecedented amount.
The average power of your NIR laser even now has the prospective to become enhanced to tens of watts like 70 W [26] In the event the double-pass configuration might be used for that Yb:YAG SCF amplifier stage. Hence, If your conversion effectiveness of 31% from NIR to DUV could be however maintained at this larger power condition, the normal output energy on the DUV laser at 258 nm can be greater than 20 W, which would become a extraordinary power level for that DUV laser and result in the unanticipated DUV laser machining results. Additionally, for high-energy DUV laser, the UV damage of the nonlinear crystal, including the Home windows for CLBO crystal and the mirrors, is an additional significant parameter for long term and stable Procedure.
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LBO is also a fantastic nonlinear crystal which is often placed on the SHG in the NIR on the environmentally friendly. The DUV laser is generally realized by two phases of SFG from the LBO crystals because there is absolutely no stage-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm on the DUV instantly by SHG [16]. Not too long ago, the NSBBF crystal has also demonstrated its probable to acquire a superior conversion performance from 532 nm to 266 nm. The wander-off angle and deff of your NSBBF are Pretty much just like People of CLBO [17].
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best get more info non-linear crystal which generates ultraviolet harmonics in the Nd:YAG fundamental laser wavelength. In an effort to enrich the problems threshold, lower CLBO surface roughness, by ultra-precision machining, is needed. As the CLBO crystal has uncomplicated hydroscopic reaction and micro scratches in machining, ultra-specific machining with the CLBO crystal is often a hard specialized problem.
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The conversion performance from fundamental NIR to DUV is from 5% to 36% based on the reported leads to Desk one. Growing the conversion performance will reduce the burden on the design and setup of the basic laser amplifier as well as the electric energy intake. A very good beam high quality of the basic laser can even add towards the rising with the conversion performance as well as the appropriate electrical power intensity in the NIR and eco-friendly laser while in the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and around fifty%, respectively [twelve], which corresponds on the conversion efficiency of 35% from fundamental to DUV.
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