The Greatest Guide To CLBO Crystal
The Greatest Guide To CLBO Crystal
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All-stable-point out ultraviolet lasers are actually greatly used in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of small quantity, very long everyday living, significant effectiveness, excellent beam top quality, wide tuning and slim spectral line, and so on. Utilizing superior electric power in close proximity to-infrared coherent mild resource as the fundamental frequency supply according to nonlinear tuning technological innovation, creating ultraviolet coherent radiation by multistage frequency conversion is viewed as a crucial solution to build the ultraviolet coherent light-weight source.
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The true secret difficulty of ultraviolet coherent mild supply generally concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the circumstances for frequency transformation, so the growth, measurement, hurt resistance, conversion effectiveness and allowable parameter variety of nonlinear optical crystal are essential A lot more.
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LBO is likewise a great nonlinear crystal which is usually placed on the SHG from the NIR for the inexperienced. The DUV laser will likely be realized by two phases of SFG during the LBO crystals given that there is no 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 acquire a superior conversion performance from 532 nm to 266 nm. The walk-off angle and deff on the NSBBF are Practically just like Individuals of CLBO [17].
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Furthermore, combining the stable-state laser with other nonlinear course of action like stimulated Raman scattering, NIR lasers may very well be accomplished at new wavelengths with significant power and substantial beam high-quality, which was tested through the evidence-of-basic principle experiment. This Raman laser plan provides a new route to the higher-electricity DUV laser, In particular for the wavelength of 193 nm.
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The conversion effectiveness from fundamental NIR to DUV is from five% to 36% based on the reported ends in Table one. Escalating the conversion effectiveness will lessen the burden on the look and setup of the elemental laser amplifier plus the electric electric power usage. A very good beam good quality of the fundamental laser may even add for the expanding from the conversion effectiveness as well as the appropriate electricity depth of the NIR and inexperienced laser from the SHG and FHG method, respectively. The best conversion efficiencies from NIR to inexperienced and green to DUV laser by use of CLBO crystal are 70% and about 50%, respectively [twelve], which corresponds on the conversion click here effectiveness of 35% from basic to DUV.
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