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 are already widely Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact quantity, extended everyday living, substantial performance, superior beam good quality, extensive tuning and narrow spectral line, and so forth. Using superior energy in close proximity to-infrared coherent mild resource as the fundamental frequency resource depending on nonlinear tuning know-how, building ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital technique to establish the ultraviolet coherent gentle source.
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The real key issue of ultraviolet coherent mild supply largely concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the conditions for frequency transformation, so The expansion, size, harm resistance, conversion effectiveness and allowable parameter number of nonlinear optical crystal are expected An increasing number of.
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LBO can also be an outstanding nonlinear crystal which is often applied to the SHG through the NIR towards the green. The DUV laser is generally realized by two stages of SFG inside the LBO crystals due to the fact there is absolutely no period-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV instantly by SHG [16]. Lately, the NSBBF crystal has also shown its opportunity to get a higher conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff in the NSBBF are Practically comparable to People of CLBO [seventeen].
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From the scientific and industrial purposes, the beam quality of the DUV laser is additionally a vital parameter. Notably, the beam good quality on the DUV laser substantially impacts the laser machining outcomes. The beam high quality of the DUV laser is set by that of the fundamental laser plus the crystal to the frequency conversion. Recently, a significant-electricity DUV laser (>10 W) at 258 nm was noted by using a beam top quality of M2 < 1.5, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would lead to a greater laser machining result when compared with the earlier DUV lasers with bigger M2.
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Also, combining the solid-state laser with other nonlinear approach including stimulated Raman scattering, NIR lasers might be accomplished at new wavelengths with superior electric power and large beam high quality, which was examined because of the proof-of-theory experiment. This Raman laser scheme supplies a brand new route to the substantial-energy DUV laser, Particularly in the wavelength of 193 nm.
Tunable ultraviolet laser supply based upon good-point out dye laser technology and CsLiB6O10 harmonic technology
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