CLBO Crystal Things To Know Before You Buy
CLBO Crystal Things To Know Before You Buy
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As an example, The existing concave OC could be replaced by a plane mirror which could mitigate the ability density over the area of M1 as well as the diamond. Furthermore, using superior harm threshold coatings for M1 and diamond would also Enhance the output ability with no damages. Then, the NIR laser within the 2nd Stokes wavelength may be significant more than enough, and also its great beam excellent, to crank out the ultimate DUV laser at 193 nm with a higher common ability.
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As a result of thermal lens effect during the reliable-condition lasers, In the event the heating administration is inadequate, It's not at all quick to obtain the good-point out laser which has a higher power along with a superior beam high quality simultaneously. Not too long ago, with the development of the thin disk laser and single-crystal fiber (SCF) laser, a high-energy laser at the elemental wavelength (1 μm) had been recognized with an excellent beam high-quality In spite of a TEM00 method beam [4,24], which would be good candidates for the basic in the DUV laser technology. One more prospect for the fundamental could be the high-power fiber laser which could be reached by coherent beam mix with M2 benefit fewer than 1.
On the other side, the ability scaling on the NIR laser is another part to raise the common power in the 193-nm DUV laser. Because of the lack of the higher-electrical power amplification Answer from the NIR laser (for example at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) might be applied to establish a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to obtaining relative increased electricity [21]. A short while ago, a diamond Raman laser showed its potential in reaching a large ability and also a higher conversion effectiveness at the 1st Stokes from the 1-μm laser [22,23], which implies the possibility to generally be applied from the 193-nm DUV laser technology because of its higher Raman achieve and huge frequency shift.
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While in the scientific and industrial programs, the beam top quality with the DUV laser can also be a significant parameter. Specially, the beam quality with the DUV laser dramatically has an effect on the laser machining success. The beam high-quality from the DUV laser is decided by that of the elemental laser as well as crystal for the frequency conversion. Not too long ago, a high-electrical power DUV laser (>10 W) at 258 nm was documented using a beam excellent of M2 < one.five, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would produce a far better laser machining end result as compared to the previous DUV lasers with more substantial M2.
The heartbeat period of the 2nd Stokes light was shortened to 5 ns as revealed in Determine 7a, a single-shot image with the oscilloscope, which can be a typical phenomenon in Raman laser [44] although the heartbeat length in the pump laser was ten ns.
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The beam profile shown in Determine 7b demonstrated a good beam high-quality as one of many merits of Raman laser, which would be valuable to generate a 193-nm DUV laser with a top quality beam.
The conversion efficiency from elementary NIR to DUV is from five% to 36% in accordance with the documented leads to Table one. Expanding the conversion performance will reduce the load on the look and setup of the fundamental laser click here amplifier as well as the electrical electricity consumption. A good beam high quality of the elemental laser may also lead towards the raising on the conversion performance along with the right ability depth from the NIR and eco-friendly laser during the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by utilization of CLBO crystal are 70% and all-around fifty%, respectively [twelve], which corresponds on the conversion performance of 35% from basic to DUV.
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