CLBO Crystal Fundamentals Explained
CLBO Crystal Fundamentals Explained
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All-reliable-point out ultraviolet lasers have been broadly used in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of modest volume, lengthy lifestyle, higher performance, fantastic beam excellent, wide tuning and slender spectral line, and many others. Using high electric power around-infrared coherent mild resource as the basic frequency supply based on nonlinear tuning engineering, making ultraviolet coherent radiation by multistage frequency conversion is viewed as an important strategy to develop the ultraviolet coherent mild supply.
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The typical electricity in the NIR laser nonetheless has the potential being improved to tens of watts such as 70 W [26] Should the double-move configuration could be used for the Yb:YAG SCF amplifier stage. Hence, Should the conversion effectiveness of 31% from NIR to DUV could possibly be still preserved at this greater ability problem, the average output electricity with the DUV laser at 258 nm might be in excess of twenty W, which might be a exceptional electricity stage with the DUV laser and lead to the unanticipated DUV laser machining outcomes. Furthermore, for high-power DUV laser, the UV hurt of your nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is yet another vital parameter for long term and secure Procedure.
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LBO is usually an excellent nonlinear crystal which is often applied to the SHG through the NIR on the inexperienced. The DUV laser is often understood by two levels of SFG in the LBO crystals since there isn't a period-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm into the DUV immediately by SHG [16]. Recently, the NSBBF crystal has also revealed its CLBO Crystal likely to obtain a large conversion efficiency from 532 nm to 266 nm. The stroll-off angle and deff from the NSBBF are Pretty much much like Those people of CLBO [17].
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In addition, combining the stable-point out laser with other nonlinear procedure for instance stimulated Raman scattering, NIR lasers might be realized at new wavelengths with significant electrical power and high beam good quality, which was analyzed by the proof-of-principle experiment. This Raman laser scheme supplies a completely new path to the high-energy DUV laser, In particular with the wavelength of 193 nm.
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Its UV absorption edge reaches 180 nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as large as that of KDP. CLBO crystals is often grown with the stoichiometric melt with decrease viscosity.
The event of the 193-nm laser was demonstrated by phases of SFG. So that you can scale the DUV laser electrical power proficiently, a new idea on the 193-nm DUV laser technology is introduced dependant on the diamond Raman laser.