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In accordance with the proof-of-theory experiment, the conversion performance of 23% implied the possibility of acquiring higher-electrical power at the next Stokes wavelength on the Raman laser. If your pump laser of 1078 nm can be attained at the standard ability of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm can be greater than ten W. The look from the Raman laser cavity ought to be optimized so that you can steer clear of the destruction with the M1 and diamond floor.
The true secret trouble of ultraviolet coherent light source mostly concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the disorders for frequency transformation, so The expansion, dimensions, injury resistance, conversion efficiency and allowable parameter selection of nonlinear optical crystal are needed A growing number of.
However, the beam high quality of the increased power DUV laser would turn out to be even worse because of more significant thermal and nonlinear effects. For this reason, the frequency conversion procedures need to be diligently made to mitigate the aforementioned results. Thus, a significant-power DUV laser for the FHG of one μm with a superb beam excellent may very well be obtained and will be advantageous for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
Both of those the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Each individual laser is amplified by levels of fiber amplifier and Yb-doped components amplifier, respectively.
On another aspect, the power scaling of the NIR laser is another aspect to increase the ordinary ability with the 193-nm DUV laser. Mainly because of the insufficient the superior-electricity amplification Answer with the NIR laser (one example is at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) may very well be applied to produce a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with getting relative larger electric power [21]. Lately, a diamond Raman laser showed its capacity in obtaining a superior energy and also a superior conversion efficiency at the 1st Stokes from the 1-μm laser [22,23], which implies the more info possibility to generally be used during the 193-nm DUV laser generation because of its high Raman achieve and enormous frequency shift.
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In addition, combining the sound-state laser with other nonlinear course of action including stimulated Raman scattering, NIR lasers can be attained at new wavelengths with significant electric power and high beam top quality, which was examined because of the evidence-of-basic principle experiment. This Raman laser plan presents a new route to the high-electricity DUV laser, In particular for the wavelength of 193 nm.
The beam profile revealed in Determine 7b demonstrated an excellent beam excellent as among the list of merits of Raman laser, which would be valuable to crank out a 193-nm DUV laser with a high quality beam.
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