5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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All-good-point out ultraviolet lasers are actually greatly used in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of modest volume, extended existence, superior efficiency, good beam quality, huge tuning and slim spectral line, and many others. Using large energy near-infrared coherent light-weight supply as the fundamental frequency supply depending on nonlinear tuning engineering, creating ultraviolet coherent radiation by multistage frequency conversion is regarded as a crucial solution to establish the ultraviolet coherent light-weight source.
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Based on the proof-of-theory experiment, the conversion performance of 23% implied the possibility of attaining significant-energy at the next Stokes wavelength on the Raman laser. If your pump laser of 1078 nm could be obtained at the average energy of 50 W, the output power of its 2nd Stokes wavelength at 1512 nm might be in excess of 10 W. The look of the Raman laser cavity need to be optimized so that you can stay away from the injury from the M1 and diamond area.
For illustration, The present concave OC could get replaced by a airplane mirror which could mitigate the facility density about the area of M1 along with the diamond. Moreover, making use of significant damage threshold coatings for M1 and diamond would also Enhance the output electric power with none damages. Then, the NIR laser at the 2nd Stokes wavelength could possibly be superior sufficient, along with its very good beam high-quality, to deliver the ultimate DUV laser at 193 nm which has a superior ordinary power.
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On one other aspect, the power scaling of your NIR laser is yet another component to raise the normal power of the 193-nm DUV laser. Mainly because of the not enough the significant-electric power amplification Answer on the NIR laser (for instance at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could possibly be placed on make a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative better energy [21]. Just lately, a diamond Raman laser showed its potential in reaching a higher energy as well as a large conversion efficiency at the 1st Stokes of the one-μm laser [22,23], which means the likelihood to get applied in the 193-nm DUV laser era as a result of its higher Raman attain and huge frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of the Nd:YAG essential laser wavelength. So that you can greatly enhance the problems threshold, lower CLBO surface area roughness, by ultra-precision machining, is necessary. Because the CLBO crystal has easy hydroscopic reaction and micro scratches in machining, extremely-specific machining with the CLBO crystal is actually a tough technological dilemma.
Tunable ultraviolet laser supply depending on good-point out dye laser technology and CsLiB6O10 harmonic technology
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The event of your 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser electric power successfully, a different concept in the 193-nm DUV laser era is introduced according to the diamond Raman laser.