All-good-state ultraviolet lasers have already been extensively Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of smaller quantity, prolonged everyday living, superior performance, superior beam excellent, vast tuning and narrow spectral line, and so on. Making use of substantial electricity near-infrared coherent light-weight resource as the fundamental frequency source based on nonlinear tuning know-how, building ultraviolet coherent radiation by multistage frequency conversion is thought to be a crucial approach to create the ultraviolet coherent mild source.
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We summarized The existing progress status of your large-power DUV laser both of those for the wavelength of FHG from the one-μm laser and at 193 nm. The current enhancement from the stable-point out/fiber laser, plus the nonlinear optical crystals, prompts not just the common power but also the beam high quality (coherence) with the DUV lasers to an unprecedented level.
The average electric power of your NIR laser nonetheless has the possible to be enhanced to tens of watts such as 70 W [26] When the double-pass configuration can be used for your Yb:YAG SCF amplifier phase. That's why, When the conversion performance of 31% from NIR to DUV might be however preserved at this better ability condition, the normal output power with the DUV laser at 258 nm could be over twenty W, which might certainly be a remarkable electricity stage with the DUV laser and lead to the unanticipated DUV laser machining benefits. Moreover, for high-energy DUV laser, the UV hurt with the nonlinear crystal, including the windows for CLBO crystal as well as the mirrors, is another essential parameter for long term and secure operation.
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The beam profile revealed in Figure 7b demonstrated a superb beam high-quality as one of the merits of Raman laser, which would be beneficial to deliver a 193-nm DUV laser with a top quality beam.
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