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We summarized The existing advancement status with the large-electricity DUV laser both with the wavelength of FHG from the 1-μm laser and at 193 nm. The new enhancement on the strong-point out/fiber laser, as well as the nonlinear optical crystals, prompts not simply the typical electric power but in addition the beam quality (coherence) of your DUV lasers to an unprecedented stage.
The real key issue of ultraviolet coherent mild source mostly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is probably the conditions for frequency transformation, so the growth, dimension, injury resistance, conversion efficiency and allowable parameter variety of nonlinear optical crystal are essential Progressively more.
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On one other side, the facility scaling from the NIR laser is yet another element to enhance the common electrical power of the 193-nm DUV laser. As a result of not enough the higher-ability amplification Answer with the NIR laser (for example at 1553 nm), nonlinear frequency processes including optical parameter oscillation (OPO) may very well be placed on establish a wavelength converter by shifting the wavelength from one μm to the specified wavelength as well as obtaining relative larger electricity [21]. Just lately, a diamond Raman laser showed its potential in accomplishing a superior ability and a higher conversion efficiency on the 1st Stokes in the 1-μm laser [22,23], which implies the possibility to be used in the 193-nm DUV laser generation thanks to its superior Raman get and huge frequency shift.
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What's more, combining the stable-point out laser with other nonlinear method for example stimulated Raman scattering, NIR lasers may very well be achieved at new wavelengths with significant power and substantial beam top quality, which was tested by the proof-of-principle experiment. This Raman laser plan delivers a fresh route to the substantial-energy DUV laser, Specifically for the wavelength of 193 nm.
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The development on the 193-nm laser was shown by stages of SFG. So as to scale the DUV laser electrical power correctly, a fresh strategy from the 193-nm DUV laser era is introduced based on the diamond Raman laser.