Even so, so that you can approach the crystal is quite Highly developed producing tactics are expected. For the reason that dawn of this crystal, focusing on this challenge, we are now the one enterprise on this planet which can be processed With this crystal.
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We summarized The present progress status on the high-electric power DUV laser both on the wavelength of FHG with the one-μm laser and at 193 nm. The recent advancement on the reliable-condition/fiber laser, together with the nonlinear optical crystals, prompts not only the average electricity and also the beam quality (coherence) from the DUV lasers to an unprecedented degree.
The true secret difficulty of ultraviolet coherent gentle supply primarily concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the disorders for frequency transformation, so The expansion, sizing, destruction resistance, conversion performance and allowable parameter number of nonlinear optical crystal are demanded Increasingly more.
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On the opposite aspect, the power scaling of your NIR laser is an additional facet to boost the regular electricity in the 193-nm DUV laser. As a result of lack of the significant-energy amplification Resolution of your NIR laser (such as at 1553 nm), nonlinear frequency procedures for instance optical parameter oscillation (OPO) could possibly be applied to establish a wavelength converter by shifting the wavelength from one μm to the desired wavelength and obtaining relative bigger electricity [21]. Not too long ago, a diamond Raman laser showed its means in attaining a superior electricity plus a superior conversion efficiency within the 1st Stokes on the 1-μm laser [22,23], which means the possibility to generally be applied while in the 193-nm DUV laser generation due to its significant Raman get and huge frequency shift.
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In addition, combining the good-point out laser with other nonlinear method which include stimulated Raman scattering, NIR lasers could possibly be obtained at new wavelengths with large electric power and high beam high-quality, which was tested here through the proof-of-theory experiment. This Raman laser plan delivers a brand new route to the higher-electricity DUV laser, Particularly within the wavelength of 193 nm.
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Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals is usually developed in the stoichiometric melt with reduce viscosity.
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