Rumored Buzz on CLBO Crystal
Rumored Buzz on CLBO Crystal
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Based on the evidence-of-basic principle experiment, the conversion efficiency of 23% implied the potential of accomplishing large-ability at the second Stokes wavelength on the Raman laser. Should the pump laser of 1078 nm could possibly be received at the normal power of 50 W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may be greater than ten W. The look from the Raman laser cavity needs to be optimized as a way to avoid the destruction on the M1 and diamond surface area.
For instance, the current concave OC could get replaced by a aircraft mirror which could mitigate the ability density about the floor of M1 and also the diamond. Also, applying higher injury threshold coatings for M1 and diamond would also Increase the output ability with no damages. Then, the NIR laser with the 2nd Stokes wavelength could be high more than enough, and also its excellent beam top quality, to generate the final DUV laser at 193 nm by using a higher normal energy.
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As a result of thermal lens influence in the sound-condition lasers, Should the heating management is inadequate, It is far from simple to acquire the reliable-state laser which has a superior ability plus get more info a high beam excellent simultaneously. Just lately, with the event of The skinny disk laser and one-crystal fiber (SCF) laser, a substantial-ability laser at the basic wavelength (1 μm) had been recognized with a very good beam top quality Despite a TEM00 manner beam [4,24], which might be very good candidates for the fundamental in the DUV laser technology. Another applicant for the elemental is definitely the significant-energy fiber laser which may be accomplished by coherent beam mix with M2 price a lot less than 1.
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During the scientific and industrial applications, the beam high-quality from the DUV laser is additionally a vital parameter. Significantly, the beam good quality on the DUV laser significantly influences the laser machining final results. The beam quality with the DUV laser is set by that of the elemental laser as well as crystal for the frequency conversion. Recently, a significant-ability DUV laser (>10 W) at 258 nm was described that has a beam quality of M2 < 1.five, which was created by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would bring on a far better laser machining result when compared with the prior DUV lasers with more substantial M2.
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Furthermore, combining the good-point out laser with other nonlinear approach for example stimulated Raman scattering, NIR lasers could be realized at new wavelengths with significant electricity and superior beam high-quality, which was tested through the proof-of-basic principle experiment. This Raman laser plan provides a whole new path to the significant-power DUV laser, Specifically in the wavelength of 193 nm.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the noted ends in Table one. Growing the conversion efficiency will reduce the load on the look and set up of the fundamental laser amplifier along with the electrical ability consumption. An excellent beam quality of the fundamental laser can even lead for the escalating on the conversion efficiency as well as the suitable electric power depth from the NIR and green laser during the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by use of CLBO crystal are 70% and all over fifty%, respectively [twelve], which corresponds into the conversion efficiency of 35% from elementary to DUV.
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