Not known Details About CLBO Crystal
Not known Details About CLBO Crystal
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All-stable-point out ultraviolet lasers are broadly Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of small volume, lengthy existence, higher performance, very good beam good quality, large tuning and slim spectral line, and so forth. Utilizing high electric power in close proximity to-infrared coherent light supply as the elemental frequency supply determined by nonlinear tuning technological know-how, making ultraviolet coherent radiation by multistage frequency conversion is considered a crucial technique to build the ultraviolet coherent light-weight source.
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The standard energy with the NIR laser still has the likely to get improved to tens of watts which include 70 W [26] if the double-move configuration could be utilized with the Yb:YAG SCF amplifier stage. That's why, if the conversion efficiency of 31% from NIR to DUV could possibly be even now managed at this larger energy condition, the standard output electrical power in the DUV laser at 258 nm can be much more than twenty W, which would be considered a amazing energy amount to the DUV laser and result in the unanticipated DUV laser machining success. Additionally, for top-power DUV laser, the UV destruction of the nonlinear crystal, such as the Home windows for CLBO crystal and also the mirrors, is an additional crucial parameter for long run and secure operation.
However, the beam top quality of this better electric power DUV laser would come to be even worse due to much more really serious thermal and nonlinear results. Therefore, the frequency conversion processes need to be very carefully made to mitigate the aforementioned effects. So, a superior-electric power DUV laser for the FHG of one μm with a superb beam high-quality could be attained and may be beneficial for getting the shorter wavelength DUV lasers including 193 nm by SFG.
Due to the thermal lens outcome inside the good-point out lasers, In the event the heating management is insufficient, it is not uncomplicated to get the solid-point out laser that has a substantial energy and a higher beam top quality at the same time. A short while ago, with the development of The skinny disk laser and one-crystal fiber (SCF) laser, a significant-electrical power laser at the elemental wavelength (one μm) were realized with a fantastic beam good quality even with a TEM00 manner beam [4,24], which would be great candidates for the basic from the DUV laser era. A further candidate for the elemental would be the significant-power fiber laser which could possibly be accomplished by coherent beam combination with M2 price lower than one.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics of the Nd:YAG basic laser wavelength. In order to improve the damage threshold, very low CLBO area roughness, by ultra-precision machining, is necessary. As the CLBO crystal has uncomplicated hydroscopic response and micro scratches in machining, ultra-exact machining on the CLBO crystal is actually a tricky technological issue.
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Its UV absorption edge reaches 180 nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as big as that of KDP. CLBO crystals is usually grown from the stoichiometric melt with reduced viscosity.
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