The Definitive Guide to CLBO Crystal

The Definitive Guide to CLBO Crystal

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All-sound-point out ultraviolet lasers have already been extensively Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of compact volume, prolonged daily life, higher effectiveness, excellent beam high-quality, vast tuning and slender spectral line, and so on. Making use of superior energy in close proximity to-infrared coherent light-weight supply as the elemental frequency resource based on nonlinear tuning technological know-how, producing ultraviolet coherent radiation by multistage frequency conversion is viewed as an important approach to acquire the ultraviolet coherent light-weight resource.

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In accordance with the proof-of-theory experiment, the conversion performance of 23% implied the opportunity of reaching substantial-ability at the 2nd Stokes wavelength of the Raman laser. When the pump laser of 1078 nm may be received at the standard power of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm could be in excess of ten W. The design on the Raman laser cavity really should be optimized in an effort to stay away from the harm from the M1 and diamond surface.

The true secret challenge of ultraviolet coherent light-weight resource largely concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the circumstances for frequency transformation, so The expansion, dimension, destruction resistance, conversion performance and allowable parameter range of nonlinear optical crystal are required A growing number of.

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LBO is likewise a great nonlinear crystal which is usually placed on the SHG from the NIR to the eco-friendly. The DUV laser is frequently realized by two phases of SFG inside the LBO crystals considering the fact that there's no phase-matching angle for LBO to transform the eco-friendly laser at 515 nm or 532 nm for the DUV instantly by SHG [sixteen]. Lately, the NSBBF crystal has also proven its likely to get a substantial conversion performance from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Just about comparable to These of CLBO [17].

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In the scientific and industrial applications, the beam top quality with the DUV laser is usually an essential parameter. Significantly, the beam high-quality of your DUV laser considerably influences the laser machining effects. The beam good quality from the DUV laser is determined by that of the fundamental laser and the crystal for the frequency conversion. Recently, a high-power DUV laser (>ten W) at 258 nm was documented using a beam top quality of M2 < one.5, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would produce an improved laser machining result as compared to the preceding DUV lasers with larger M2.

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The conversion efficiency from essential NIR to DUV is from 5% to 36% according to the more info reported brings about Table one. Raising the conversion efficiency will lessen the burden on the design and set up of the fundamental laser amplifier in addition to the electric powered electric power consumption. A very good beam good quality of the elemental laser will even add towards the raising from the conversion effectiveness and also the right energy intensity with the NIR and environmentally friendly laser during the SHG and FHG procedure, respectively. The very best conversion efficiencies from NIR to inexperienced and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and about 50%, respectively [12], which corresponds for the conversion effectiveness of 35% from elementary to DUV.

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