All-strong-condition ultraviolet lasers are widely used in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of little volume, long life, superior performance, very good beam good quality, broad tuning and slender spectral line, and so forth. Using large electrical power close to-infrared coherent light source as the elemental frequency supply according to nonlinear tuning technological know-how, building ultraviolet coherent radiation by multistage frequency conversion is considered an essential technique to create the ultraviolet coherent gentle resource.
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The key difficulty of ultraviolet coherent gentle resource primarily focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the problems for frequency transformation, so the growth, measurement, hurt resistance, conversion effectiveness and allowable parameter array of nonlinear optical crystal are needed A growing number of.
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As a result of thermal lens effect inside the strong-point out lasers, When the heating management is inadequate, It's not necessarily quick to obtain the good-condition laser having a superior electric power along with a significant beam high quality concurrently. Not long ago, with the development of the thin disk laser and solitary-crystal fiber (SCF) laser, a significant-electric power laser at the elemental wavelength (one μm) were realized with an excellent beam excellent Despite having a TEM00 mode beam [four,24], which would be excellent candidates for the elemental of the DUV laser generation. One more applicant for the basic could be the superior-energy fiber laser which could possibly be reached by coherent beam mixture with M2 value less than one.
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The heart beat duration of the second Stokes gentle was shortened to 5 ns as revealed in Figure 7a, one-shot picture within the oscilloscope, that's a common phenomenon in Raman laser [forty four] whilst the heart beat duration with the pump laser was 10 ns.
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The beam profile revealed in Figure 7b shown a great beam good quality as CLBO Crystal on the list of deserves of Raman laser, which would be beneficial to produce a 193-nm DUV laser with a top quality beam.
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