Nevertheless, to be able to procedure the crystal is very Highly developed production methods are demanded. For the reason that dawn of this crystal, engaged on this problem, we are now the one corporation on this planet that can be processed With this crystal.
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Based on the evidence-of-theory experiment, the conversion efficiency of 23% implied the potential of attaining large-power at the 2nd Stokes wavelength of your Raman laser. If the pump laser of 1078 nm could be received at the average ability of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm can be over 10 W. The design from the Raman laser cavity ought to be optimized to be able to steer clear of the problems on the M1 and diamond surface area.
The average electricity of your NIR laser nonetheless has the possible to get enhanced to tens of watts which include 70 W [26] When the double-move configuration may very well be used with the Yb:YAG SCF amplifier stage. Therefore, In case the conversion effectiveness of 31% from NIR to DUV can be still maintained at this larger electricity issue, the common output electrical power in the DUV laser at 258 nm could possibly be a lot more than 20 W, which would be a outstanding power level for the DUV laser and produce the unanticipated DUV laser machining results. What's more, for top-electricity DUV laser, the UV hurt in the nonlinear crystal, including the windows for CLBO crystal and the mirrors, is yet another significant parameter for long run and steady operation.
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As a result of thermal lens influence from the good-state lasers, if the heating management is inadequate, It's not at all quick to acquire the reliable-point out laser by using a significant power plus a significant beam quality at the same time. Recently, with the event of The skinny disk laser and solitary-crystal fiber (SCF) laser, a large-electrical power laser at the fundamental wavelength (1 μm) were recognized with a superb beam good quality Despite a TEM00 method beam [4,24], which might be fantastic candidates for the basic in the DUV laser generation. Another prospect for the basic will be the high-electric power fiber laser which may be accomplished by coherent beam mix with M2 price lower than one.
On the opposite side, the ability scaling from the NIR laser is yet another facet to increase the normal electricity with the 193-nm DUV laser. As a result of deficiency of the significant-ability amplification Alternative from the NIR laser (for example at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) may very well be placed on make a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with getting relative better power [21]. Not too long ago, a diamond Raman laser showed its potential in acquiring a higher electric power in addition to a substantial conversion effectiveness for the 1st Stokes on the 1-μm laser [22,23], which implies the possibility to get applied within the 193-nm DUV laser generation on account of its large Raman achieve and huge frequency shift.
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Moreover, combining the sound-condition laser with other nonlinear system like stimulated Raman scattering, NIR lasers may be obtained at new wavelengths with high electrical power and significant beam high-quality, which was tested from the proof-of-theory experiment. This Raman laser scheme gives a whole new path to the significant-ability DUV laser, especially in the wavelength of 193 nm.
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