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The key issue of ultraviolet coherent mild source mainly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the conditions for frequency transformation, so The expansion, dimensions, injury resistance, conversion performance and allowable parameter array of nonlinear optical crystal are essential Increasingly more.
On the flip side, the beam quality of the higher electricity DUV laser would come to be worse as a consequence of a lot more really serious thermal and nonlinear effects. That's why, the frequency conversion procedures need to be cautiously meant to mitigate the aforementioned outcomes. Consequently, a significant-power DUV laser in the FHG of one μm with a fantastic beam quality might be obtained and will be useful for acquiring the shorter wavelength DUV lasers for instance 193 nm by SFG.
Each the 1040 nm and 1078 nm laser come from 1 twin-wavelength Yb-doped fiber laser. Each individual laser is amplified by phases of fiber amplifier and Yb-doped components amplifier, respectively.
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During the scientific and industrial programs, the beam good quality on the DUV laser is likewise a very important parameter. Significantly, the beam high-quality with the DUV laser drastically has an effect on the laser machining effects. The beam good quality of the DUV laser is decided by that of the basic laser and the crystal with the frequency conversion. Not long ago, a high-electric power DUV laser (>ten W) at 258 nm was documented with a beam good quality of M2 < one.five, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would bring on a greater laser machining end result in comparison with the former DUV lasers with bigger M2.
The heartbeat duration of the next Stokes light was shortened to five ns as proven in Figure 7a, only one-shot photo in the oscilloscope, which can be a standard phenomenon in Raman laser [44] even though the pulse duration with the pump laser was ten ns.
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Tunable ultraviolet laser source according to sound-condition dye laser technological innovation and CsLiB6O10 harmonic era
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