CLBO Crystal - An Overview

CLBO Crystal - An Overview

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All-reliable-condition ultraviolet lasers are greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller volume, lengthy daily life, significant effectiveness, excellent beam high-quality, broad tuning and slender spectral line, and many others. Employing higher energy near-infrared coherent light supply as the fundamental frequency supply depending on nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is considered a crucial approach to develop the ultraviolet coherent light supply.

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We summarized The existing progress status from the superior-power DUV laser both equally on the wavelength of FHG in the 1-μm laser and at 193 nm. The new advancement from the good-point out/fiber laser, along with the nonlinear optical crystals, prompts don't just the standard electricity but will also the beam good quality (coherence) of your DUV lasers to an unparalleled level.

For instance, The existing concave OC could get replaced by a aircraft mirror which could mitigate the ability density to the floor of M1 plus the diamond. Furthermore, using significant injury threshold coatings for M1 and diamond would also Increase the output electricity without any damages. Then, the NIR laser with the 2nd Stokes wavelength might be significant sufficient, in addition to its fantastic beam high quality, to make the ultimate DUV laser at 193 nm which has a large ordinary electrical power.

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LBO is additionally an excellent nonlinear crystal which is usually placed on the SHG within the NIR for the inexperienced. The DUV laser is usually realized by two stages of SFG while in the LBO crystals considering the fact that there's no period-matching angle for LBO to transform the green laser at 515 nm or 532 nm towards the DUV immediately by SHG [sixteen]. Recently, the NSBBF crystal has also proven its prospective to get a substantial conversion performance from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are Virtually much like People of CLBO [seventeen].

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The beam profile demonstrated in Figure 7b demonstrated a superb beam excellent as one of the deserves of Raman laser, which might be effective to deliver a 193-nm DUV laser with a top quality beam.

Its UV absorption edge reaches one hundred eighty nm. The successful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals could be developed from your stoichiometric melt with reduce viscosity.

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