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Based on the evidence-of-basic principle experiment, the conversion performance of 23% implied the opportunity of reaching high-electricity at the 2nd Stokes wavelength of your Raman laser. If the pump laser of 1078 nm may be obtained at the common power of fifty W, the output ability of its 2nd Stokes wavelength at 1512 nm might be in excess of ten W. The design of your Raman laser cavity should be optimized so as to steer clear of the damage from the M1 and diamond floor.
The typical energy from the NIR laser continue to has the opportunity to be improved to tens of watts for example 70 W [26] When the double-go configuration might be utilized for your Yb:YAG SCF amplifier stage. That's why, if the conversion performance of 31% from NIR to DUV can be even now preserved at this better energy affliction, the standard output electric power on the DUV laser at 258 nm may be much more than twenty W, which would be considered a extraordinary ability stage with the DUV laser and lead to the unanticipated DUV laser machining effects. Moreover, for high-electrical power DUV laser, the UV hurt with the nonlinear crystal, including the Home windows for CLBO crystal plus the mirrors, is yet another significant parameter for long lasting and stable Procedure.
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Because of the thermal lens effect inside the solid-condition lasers, In case the heating administration is inadequate, It's not quick to get the solid-state laser having a large electrical power as well as a high beam high-quality concurrently. Lately, with the event of The skinny disk laser and single-crystal fiber (SCF) laser, a superior-power laser at the basic wavelength (1 μm) had been realized with a fantastic beam high-quality even with a TEM00 method beam [four,24], which might be good candidates for the elemental in the DUV laser technology. One more applicant for the fundamental would be the substantial-ability fiber laser which may very well be reached by coherent beam mixture with M2 value less than 1.
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Within the scientific and industrial programs, the beam good quality from the DUV laser can also be a very important parameter. Particularly, the beam top quality of your DUV laser drastically influences the laser machining outcomes. The beam good quality with the DUV laser is set by that of the fundamental laser along with the crystal for that frequency conversion. A short while ago, a substantial-ability DUV laser (>10 W) at 258 nm was described by using a beam high-quality of M2 < one.5, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would lead to a better laser machining outcome when compared to the click here earlier DUV lasers with much larger M2.
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The beam profile shown in Determine 7b shown a fantastic beam quality as on the list of merits of Raman laser, which would be helpful to produce a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The efficient nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as large as that of KDP. CLBO crystals could be grown through the stoichiometric melt with lower viscosity.
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