All-reliable-condition ultraviolet lasers have already been extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of little quantity, long existence, higher effectiveness, very good beam excellent, extensive tuning and slim spectral line, and so on. Employing significant electricity close to-infrared coherent light resource as the fundamental frequency source determined by nonlinear tuning technological innovation, generating ultraviolet coherent radiation by multistage frequency conversion is viewed as an important solution to build the ultraviolet coherent light supply.

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We summarized The present advancement status with the substantial-electrical power DUV laser both for the wavelength of FHG in the one-μm laser and at 193 nm. The new growth with the stable-state/fiber laser, along with the nonlinear optical crystals, prompts don't just the common power and also the beam top quality (coherence) of your DUV lasers to an unprecedented degree.

By way of example, The existing concave OC could get replaced by a plane mirror which could mitigate the power density around the surface of M1 and also the diamond. Furthermore, applying high damage threshold coatings for M1 and diamond would also improve the output ability with no damages. Then, the NIR laser at the 2nd Stokes wavelength may very well be large more than enough, along with its superior beam top quality, to create the ultimate DUV laser at 193 nm that has a high common electricity.

Conversely, the beam good quality of the larger power DUV laser would turn into even worse as a result of extra critical thermal and nonlinear consequences. Consequently, the frequency conversion processes really should be cautiously built to mitigate the aforementioned consequences. Hence, a significant-power DUV laser on the FHG of one μm with a superb beam quality could possibly be received and may be useful for obtaining the shorter wavelength DUV lasers like 193 nm by SFG.

Each the 1040 nm and 1078 nm laser come from one twin-wavelength Yb-doped fiber laser. Just about every laser is amplified by phases of fiber amplifier and Yb-doped supplies amplifier, respectively.

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The beam profile shown in Figure 7b demonstrated a fantastic beam quality as one of several deserves of Raman laser, which might be beneficial to produce a 193-nm DUV laser with a high quality beam.

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