Indicators on CLBO Crystal You Should Know

Indicators on CLBO Crystal You Should Know

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All-reliable-point out ultraviolet lasers have been broadly Utilized in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact quantity, lengthy existence, higher efficiency, superior beam high-quality, huge tuning and narrow spectral line, and so on. Employing large electric power in close proximity to-infrared coherent gentle source as the elemental frequency supply based upon nonlinear tuning technology, creating ultraviolet coherent radiation by multistage frequency conversion is considered a significant approach to build the ultraviolet coherent light-weight source.

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We summarized The existing progress status of your significant-electrical power DUV laser each for the wavelength of FHG with the 1-μm laser and at 193 nm. The current development on the good-point out/fiber laser, plus the nonlinear optical crystals, prompts not only the normal electrical power but also the beam high quality (coherence) with the DUV lasers to an unprecedented stage.

The typical ability of your NIR laser still has the potential to be enhanced to tens of watts like 70 W [26] Should the double-go configuration could be used with the Yb:YAG SCF amplifier stage. Therefore, In case the conversion efficiency of 31% from NIR to DUV might be continue to taken care of at this better electrical power affliction, the average output electric power from the DUV laser at 258 nm might be much more than 20 W, which would certainly be a exceptional electric power level to the DUV laser and bring about the unanticipated DUV laser machining benefits. Also, for prime-energy DUV laser, the UV hurt of your nonlinear crystal, such as the windows for CLBO crystal along with the mirrors, is an additional crucial parameter for long lasting and stable Procedure.

However, the beam high-quality of this increased electrical power DUV laser would come to be worse as a consequence of much more really serious thermal and nonlinear consequences. Therefore, the frequency conversion processes must be thoroughly designed to mitigate the aforementioned effects. Therefore, a large-electric power DUV laser with the FHG of one μm with a great beam top quality may be received and can be valuable for getting the shorter wavelength DUV lasers for instance 193 nm by SFG.

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On the other side, the power scaling of your NIR laser is yet another factor to raise the typical ability with the 193-nm DUV laser. A result of the lack of the substantial-energy amplification Option on the NIR laser (by way of example at 1553 nm), nonlinear frequency processes including optical parameter oscillation (OPO) could be placed on build a wavelength converter by shifting the wavelength from one μm to the desired wavelength and getting relative larger electrical power [21]. Just lately, a get more info diamond Raman laser showed its skill in accomplishing a higher ability and also a significant conversion effectiveness on the 1st Stokes on the 1-μm laser [22,23], which implies the chance being utilized within the 193-nm DUV laser generation as a result of its large Raman achieve and enormous frequency change.

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The conversion performance from basic NIR to DUV is from five% to 36% based on the reported ends in Desk 1. Expanding the conversion efficiency will decrease the stress on the design and set up of the elemental laser amplifier in addition to the electric ability consumption. An excellent beam excellent of the basic laser will likely add to the escalating on the conversion effectiveness and also the suitable electric power intensity of your NIR and environmentally friendly laser in the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by usage of CLBO crystal are 70% and all over 50%, respectively [12], which corresponds into the conversion effectiveness of 35% from fundamental to DUV.

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