Not known Details About CLBO Crystal
Not known Details About CLBO Crystal
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All-solid-condition ultraviolet lasers are actually widely used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller quantity, prolonged existence, large efficiency, good beam quality, large tuning and slim spectral line, etcetera. Making use of high power close to-infrared coherent mild source as the elemental frequency supply determined by nonlinear tuning know-how, building ultraviolet coherent radiation by multistage frequency conversion is considered an important way to develop the ultraviolet coherent gentle resource.
In comparison with BBO it capabilities more substantial spectral and temperature acceptance, superior angle tolerance, in addition to a smaller wander-off angle. from 3289 $ supply
Based on the evidence-of-basic principle experiment, the conversion performance of 23% implied the possibility of obtaining high-electricity at the 2nd Stokes wavelength with the Raman laser. When the pump laser of 1078 nm may be attained at the average ability of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm might be greater than 10 W. The look on the Raman laser cavity need to be optimized in order to steer clear of the hurt of the M1 and diamond floor.
The normal electricity of the NIR laser still has the opportunity to be enhanced to tens of watts such as 70 W [26] When the double-pass configuration could possibly be used for the Yb:YAG SCF amplifier phase. Consequently, If your conversion effectiveness of 31% from NIR to DUV could be nonetheless managed at this greater electrical power issue, the normal output ability of your DUV laser at 258 nm could be more than twenty W, which might be considered a exceptional electric power stage to the DUV laser and result in the unanticipated DUV laser machining success. What's more, for top-electricity DUV laser, the UV hurt in the nonlinear crystal, including the Home windows for CLBO crystal along with the mirrors, is an additional essential parameter for long run and steady Procedure.
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On one other aspect, the facility scaling in the NIR laser is yet another factor to increase the regular energy on the 193-nm DUV laser. Because of the deficiency of the higher-electricity amplification Alternative from the NIR laser (one example is at 1553 nm), nonlinear frequency procedures such as optical parameter oscillation (OPO) might be applied to produce a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with getting relative higher energy [21]. Not long ago, a diamond Raman laser confirmed its means in achieving a higher electrical power plus a substantial conversion performance in the 1st Stokes on the 1-μm laser [22,23], which means the likelihood for being used in the 193-nm DUV laser technology as a consequence of its large Raman acquire and enormous frequency shift.
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The heartbeat period of the second Stokes gentle was shortened to five ns as shown in Figure 7a, an individual-shot photograph in the oscilloscope, that's a standard phenomenon in Raman laser [forty four] while the pulse length on the pump laser was ten ns.
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The conversion efficiency from basic NIR to DUV is from five% to 36% according to the documented brings about Table 1. Raising the conversion efficiency will reduce the load on the look and set up of the elemental laser amplifier in addition to the electrical power usage. A superb beam high-quality of the fundamental laser may also lead on the raising of your conversion performance as well as the appropriate energy intensity of the NIR and green laser in the SHG and FHG process, respectively. The very best conversion efficiencies from NIR to eco-friendly and eco-friendly to DUV laser by use of CLBO crystal are 70% and all-around fifty%, respectively [12], which corresponds to the conversion performance of 35% from fundamental to DUV.
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