5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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All-reliable-condition ultraviolet lasers are actually broadly used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller volume, lengthy life, large performance, good beam quality, extensive tuning and narrow spectral line, etc. Making use of high ability in the vicinity of-infrared coherent light-weight source as the basic frequency supply determined by nonlinear tuning technological know-how, generating ultraviolet coherent radiation by multistage frequency conversion is considered a vital approach to acquire the ultraviolet coherent mild supply.
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We summarized the current development position on the superior-electrical power DUV laser each at the wavelength of FHG of your 1-μm laser and at 193 nm. The recent growth of the sound-condition/fiber laser, and also the nonlinear optical crystals, prompts not only the standard electricity and also the beam good quality (coherence) from the DUV lasers to an unprecedented level.
The true secret trouble of ultraviolet coherent light-weight source mainly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the circumstances for frequency transformation, so The expansion, dimension, injury resistance, conversion efficiency and allowable parameter selection of nonlinear optical crystal are expected A lot more.
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Due to thermal lens impact while in the good-condition lasers, If your heating administration is insufficient, It's not simple to acquire the solid-state laser by using a substantial electric power and also a significant beam excellent at the same time. Not long ago, with the development of The skinny disk laser and single-crystal fiber (SCF) laser, a substantial-electrical power laser at the elemental wavelength (1 μm) had been understood with a superb beam top quality Despite a TEM00 method beam [four,24], which would be very good candidates for the fundamental of the DUV laser generation. A further candidate for the basic may be the large-ability fiber laser which may very well be accomplished by coherent beam blend with M2 worth fewer than one.
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From the scientific and industrial programs, the beam high quality in the DUV laser is usually a significant parameter. Significantly, the beam high quality with the DUV laser drastically has an effect on the laser machining effects. The beam top quality with the DUV laser is decided by that of the elemental laser and the crystal for that frequency conversion. A short while ago, a high-electricity DUV laser (>ten W) at 258 nm was reported with a beam high quality of M2 < one.five, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would bring on a far better laser machining result when compared with the prior DUV lasers with greater M2.
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Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as substantial as that of KDP. CLBO crystals can be grown through the stoichiometric soften with reduce viscosity.
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