5 Tips about CLBO Crystal You Can Use Today
5 Tips about CLBO Crystal You Can Use Today
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All-stable-point out ultraviolet lasers are already commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller volume, extended everyday living, high performance, superior beam top quality, wide tuning and narrow spectral line, and so forth. Using high energy in the vicinity of-infrared coherent gentle resource as the elemental frequency source depending on nonlinear tuning know-how, building ultraviolet coherent radiation by multistage frequency conversion is considered to be a very important method to create the ultraviolet coherent mild supply.
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According to the evidence-of-basic principle experiment, the conversion efficiency of 23% implied the potential for achieving high-electrical power at the next Stokes wavelength of the Raman laser. In case the pump laser of 1078 nm could be received at the normal energy of fifty W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may be more than ten W. The design of your Raman laser cavity must be optimized in an effort to steer clear of the harm with the M1 and diamond area.
The main element issue of ultraviolet coherent mild source largely focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is among the conditions for frequency transformation, so The expansion, sizing, problems resistance, conversion efficiency and allowable parameter choice of nonlinear optical crystal are essential A lot more.
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LBO is additionally a wonderful nonlinear crystal which is often placed on the SHG from your NIR to your eco-friendly. The DUV laser is often realized by two phases of SFG in the LBO crystals since there is absolutely no stage-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm to the DUV immediately by SHG [sixteen]. A short while ago, the NSBBF crystal has also proven its probable to get a high conversion efficiency from 532 nm to 266 nm. The wander-off angle and deff in the NSBBF are Just about comparable to those of CLBO [seventeen].
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From the scientific and industrial applications, the beam quality in the DUV laser is also a significant parameter. Especially, the beam excellent of the DUV laser substantially has an effect on the laser machining success. The beam high quality of the DUV laser is determined by that of the fundamental laser along with the crystal for the frequency conversion. Not too long ago, a substantial-electric power DUV laser (>ten W) at 258 nm was described using a beam top quality of M2 < 1.five, which was produced by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring about an improved laser machining end result when compared to the earlier DUV lasers with greater M2.
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The conversion performance from fundamental NIR to DUV is from five% to 36% based on the claimed leads to Desk 1. Increasing the conversion performance will reduce the stress on the design and set up of the basic laser amplifier in addition to the electric electric power consumption. A fantastic beam high quality of the elemental laser will even add for the raising of the conversion performance and the appropriate electricity depth of your NIR and green laser inside the SHG and FHG approach, respectively. The best conversion efficiencies from NIR to environmentally friendly and more info environmentally friendly to DUV laser by usage of CLBO crystal are 70% and around 50%, respectively [twelve], which corresponds into the conversion performance of 35% from essential to DUV.
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