All-stable-state ultraviolet lasers have been greatly used in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of smaller quantity, lengthy everyday living, substantial efficiency, very good beam high quality, wide tuning and slender spectral line, and so forth. Utilizing substantial energy in close proximity to-infrared coherent mild resource as the fundamental frequency source based upon nonlinear tuning technologies, creating ultraviolet coherent radiation by multistage frequency conversion is viewed as an important method to build the ultraviolet coherent mild supply.
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Based on the evidence-of-theory experiment, the conversion effectiveness of 23% implied the opportunity of acquiring large-electrical power at the next Stokes wavelength of your Raman laser. In the event the pump laser of 1078 nm might be obtained at the standard electric power of 50 W, the output electric power of its 2nd Stokes wavelength at 1512 nm might be over 10 W. The look of the Raman laser cavity must be optimized so as to stay away from the harm in the M1 and diamond surface area.
By way of example, The present concave OC could get replaced by a aircraft mirror which could mitigate the power density over the surface area of M1 and the diamond. Also, making use of high hurt threshold coatings for M1 and diamond would also improve the output electric power without any damages. Then, the NIR laser on the 2nd Stokes wavelength could possibly be higher plenty of, along with its superior beam good quality, to generate the ultimate DUV laser at 193 nm with a substantial average electricity.
Then again, the beam excellent of this larger electrical power DUV laser would come to be worse because of extra critical thermal and nonlinear results. That's why, the frequency conversion procedures needs to be meticulously meant to mitigate the aforementioned outcomes. Thus, a superior-power DUV laser within the FHG of one μm with a very good beam top quality could possibly be acquired and will be valuable for obtaining the shorter wavelength DUV lasers like 193 nm by SFG.
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The heart beat period of the second Stokes light-weight was shortened to five ns as revealed in Determine 7a, just one-shot photograph in the oscilloscope, that's a standard phenomenon in Raman laser [forty four] while the heart beat duration from the pump laser was 10 ns.
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The development of your 193-nm laser was demonstrated by stages of SFG. To be able to scale the DUV laser electricity effectively, a brand new thought on the 193-nm DUV laser era is offered dependant on the diamond Raman laser.