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 have already been broadly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of modest volume, very long everyday living, superior effectiveness, very good beam top quality, broad tuning and narrow spectral line, etc. Employing substantial electrical power close to-infrared coherent gentle source as the elemental frequency source based on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is considered a vital technique to produce the ultraviolet coherent light supply.
When compared with BBO it features much larger spectral and temperature acceptance, much better angle tolerance, in addition to a smaller sized stroll-off angle. from 3289 $ shipping
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The key difficulty of ultraviolet coherent gentle supply largely concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the disorders for frequency transformation, so The expansion, dimensions, destruction resistance, conversion performance and allowable parameter number of nonlinear optical crystal are necessary A lot more.
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LBO is usually a superb nonlinear crystal which is usually placed on the SHG in the NIR on the inexperienced. The DUV laser is generally understood by two levels of SFG within the LBO crystals considering the fact that there is not any phase-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV immediately by SHG [16]. Not too long ago, the NSBBF crystal has also proven its prospective to obtain a higher conversion efficiency from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Virtually similar to those of CLBO [seventeen].
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Within the scientific and industrial applications, the beam high-quality with the DUV laser can be a crucial parameter. Especially, the beam high-quality on the DUV laser significantly has an effect on the laser machining final results. The beam quality on the DUV laser is determined by that of the fundamental laser as well as crystal to the frequency conversion. Lately, a significant-energy DUV laser (>10 W) at 258 nm was described having a beam excellent of M2 < 1.5, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would produce an improved laser machining result when compared with the previous DUV lasers with more substantial M2.
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In addition, combining the good-state laser with other nonlinear course of action like stimulated Raman scattering, NIR lasers may very well be attained at new wavelengths with significant power and substantial beam excellent, which was analyzed by the proof-of-principle experiment. This Raman laser scheme supplies a completely new path to the superior-energy DUV laser, Specifically for the wavelength of 193 nm.
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The conversion performance from basic NIR to DUV is from five% to 36% based on the claimed leads to Desk 1. Expanding the conversion performance will decrease the stress on the design and setup of the elemental laser amplifier in addition to the electric powered energy use. An excellent beam high-quality of the fundamental laser may even add to the rising with the conversion performance along with the appropriate electric power intensity on the NIR and green laser from the SHG and FHG system, respectively. The highest conversion efficiencies from NIR to eco-friendly and environmentally friendly to DUV laser by utilization of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds on the conversion efficiency of 35% from elementary to DUV.
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