CLBO Crystal Can Be Fun For Anyone

CLBO Crystal Can Be Fun For Anyone

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All-reliable-condition ultraviolet lasers are commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of smaller volume, prolonged everyday living, high efficiency, good beam high quality, broad tuning and narrow spectral line, etc. Making use of large ability near-infrared coherent light-weight supply as the elemental frequency source based on nonlinear tuning technological know-how, creating ultraviolet coherent radiation by multistage frequency conversion is considered an essential strategy to acquire the ultraviolet coherent mild source.

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The common electric power on the NIR laser even now has the prospective to get enhanced to tens of watts for example 70 W [26] In case the double-move configuration might be utilized for the Yb:YAG SCF amplifier phase. Consequently, In the event the conversion efficiency of 31% from NIR to DUV can be even now taken care of at this higher electric power affliction, the average output electricity of your DUV laser at 258 nm could possibly be in excess of twenty W, which would become a amazing electricity amount for the DUV laser and bring about the unanticipated DUV laser machining success. Moreover, for prime-ability DUV laser, the UV damage from the nonlinear crystal, including the windows for CLBO crystal plus the mirrors, is an additional vital parameter for long term and secure Procedure.

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LBO can also be an excellent nonlinear crystal which is always applied to the SHG from the NIR towards the eco-friendly. The DUV laser is generally recognized by two levels of SFG in the LBO crystals because there's no phase-matching angle for LBO to transform the green laser at 515 nm or 532 nm into the DUV specifically by SHG [16]. A short while ago, the NSBBF crystal has also demonstrated its likely to get a substantial conversion effectiveness from 532 nm to 266 nm. The walk-off angle and deff from the NSBBF are almost comparable to People of CLBO [17].

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From the scientific and industrial apps, the beam good quality in the DUV laser is also an important parameter. Particularly, the beam top quality of the DUV laser considerably impacts the laser machining success. The beam top quality of your DUV laser is determined by that of the basic laser and the crystal to the frequency conversion. A short while ago, a large-electric power DUV laser (>ten W) at 258 nm was documented that has a beam high quality of M2 < 1.5, which was generated by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in an even better laser machining final result when compared with the past DUV lasers with larger M2.

The pulse length of the next Stokes light-weight was shortened to 5 ns as demonstrated in Figure 7a, just one-shot image within the oscilloscope, that's a standard phenomenon in Raman laser [44] even though the heart beat duration on the pump laser was ten ns.

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The conversion effectiveness from elementary NIR to DUV is from 5% to 36% based on the noted brings about Table one. Escalating the conversion performance will decrease the stress on the design and set up of the fundamental laser amplifier together with the electric electric power consumption. A fantastic beam high quality of the elemental laser will likely lead on the raising on the conversion performance together with the appropriate electrical power intensity on the NIR and inexperienced laser during the SHG and FHG process, respectively. The best conversion efficiencies from NIR to green and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [12], which corresponds for the conversion efficiency of 35% from essential to DUV.

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