A Simple Key For CLBO Crystal Unveiled
A Simple Key For CLBO Crystal Unveiled
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In accordance with the evidence-of-principle experiment, the conversion performance of 23% implied the potential of obtaining superior-power at the 2nd Stokes wavelength of your Raman laser. If the pump laser of 1078 nm may very well be received at the standard power of 50 W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may be much more than ten W. The look of your Raman laser cavity ought to be optimized to be able to avoid the damage of your M1 and diamond floor.
The normal electrical power of the NIR laser even now has the possible to get enhanced to tens of watts including 70 W [26] If your double-pass configuration may be used with the Yb:YAG SCF amplifier stage. Consequently, If your conversion effectiveness of 31% from NIR to DUV can be continue to maintained at this larger ability situation, the common output electric power of your DUV laser at 258 nm might be over 20 W, which might certainly be a extraordinary electric power stage to the DUV laser and result in the unanticipated DUV laser machining final results. Furthermore, for top-electricity DUV laser, the UV injury from the nonlinear crystal, such as the windows for CLBO crystal and also the mirrors, is an additional essential parameter for long term and secure operation.
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On another side, the facility scaling on the NIR laser is another aspect to enhance the regular energy of your 193-nm DUV laser. Due to the insufficient the significant-energy amplification Resolution of your NIR laser (as an example at 1553 nm), nonlinear frequency procedures which include optical parameter oscillation (OPO) might be placed on establish a more info wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with getting relative higher electricity [21]. Not long ago, a diamond Raman laser confirmed its capability in obtaining a significant ability and a higher conversion efficiency at the 1st Stokes from the 1-μm laser [22,23], which suggests the possibility to become applied during the 193-nm DUV laser era as a result of its higher Raman gain and huge frequency shift.
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In the scientific and industrial purposes, the beam excellent of the DUV laser is usually a significant parameter. Significantly, the beam good quality from the DUV laser substantially has an effect on the laser machining effects. The beam good quality with the DUV laser is set by that of the fundamental laser plus the crystal for your frequency conversion. A short while ago, a substantial-power DUV laser (>10 W) at 258 nm was claimed which has a beam top quality of M2 < one.5, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would cause a far better laser machining outcome when compared to the former DUV lasers with greater M2.
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The beam profile shown in Figure 7b demonstrated a very good beam high-quality as among the merits of Raman laser, which would be helpful to make a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals can be developed in the stoichiometric soften with reduced viscosity.
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