The smart Trick of CLBO Crystal That No One is Discussing
The smart Trick of CLBO Crystal That No One is Discussing
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All-sound-point out ultraviolet lasers happen to be greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of small quantity, extensive lifestyle, large effectiveness, very good beam high-quality, vast tuning and slender spectral line, and many others. Employing substantial electrical power close to-infrared coherent mild supply as the basic frequency resource based upon nonlinear tuning know-how, making ultraviolet coherent radiation by multistage frequency conversion is regarded as an essential strategy to acquire the ultraviolet coherent gentle resource.
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Based on the evidence-of-basic principle experiment, the conversion efficiency of 23% implied the potential of accomplishing superior-power at the second Stokes wavelength of the Raman laser. In the event the pump laser of 1078 nm can be obtained at the typical electricity of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm could be over 10 W. The design of your Raman laser cavity ought to be optimized as a way to avoid the destruction with the M1 and diamond floor.
The true secret challenge of ultraviolet coherent light-weight source mostly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is among the situations for frequency transformation, so the growth, dimensions, destruction resistance, conversion efficiency and allowable parameter selection of nonlinear optical crystal are necessary more and more.
On the other hand, the beam excellent of this increased power DUV laser would grow to be even worse as a consequence of a lot more serious thermal and nonlinear results. As a result, the frequency conversion processes really should be carefully intended to mitigate the aforementioned consequences. Therefore, a higher-electrical power DUV laser with the FHG of one μm with a fantastic beam high-quality may be received and can be useful for obtaining the shorter wavelength DUV lasers like 193 nm by SFG.
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On another side, the power scaling of the NIR laser is yet another element to increase the average power with the 193-nm DUV laser. As a result of insufficient the large-electrical power amplification Answer in the NIR laser (as an example at 1553 nm), nonlinear frequency processes like optical parameter oscillation CLBO Crystal (OPO) may be placed on produce a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength as well as acquiring relative better power [21]. Just lately, a diamond Raman laser confirmed its capacity in obtaining a superior power as well as a large conversion effectiveness with the 1st Stokes in the one-μm laser [22,23], which suggests the possibility for being used within the 193-nm DUV laser generation due to its large Raman obtain and large frequency shift.
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The beam profile shown in Figure 7b demonstrated an excellent beam excellent as one of the deserves of Raman laser, which might be beneficial to create a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches one hundred eighty nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as big as that of KDP. CLBO crystals may be developed from the stoichiometric melt with reduced viscosity.
The development of your 193-nm laser was demonstrated by levels of SFG. As a way to scale the DUV laser power properly, a new principle of the 193-nm DUV laser era is offered determined by the diamond Raman laser.