Examine This Report on CLBO Crystal

All-good-point out ultraviolet lasers are already commonly Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of tiny volume, extensive daily life, high effectiveness, superior beam good quality, extensive tuning and slender spectral line, etcetera. Making use of large power near-infrared coherent light-weight supply as the elemental frequency resource according to nonlinear tuning technological know-how, producing ultraviolet coherent radiation by multistage frequency conversion is considered a vital way to build the ultraviolet coherent mild source.

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We summarized the current advancement status of your significant-electric power DUV laser each for the wavelength of FHG on the one-μm laser and at 193 nm. The the latest advancement from the strong-condition/fiber laser, in addition to the nonlinear optical crystals, prompts not just the average energy but will also the beam top quality (coherence) from the DUV lasers to an unprecedented stage.

For illustration, The existing concave OC could get replaced by a airplane mirror which could mitigate the power density around the surface area of M1 and also the diamond. Furthermore, applying substantial harm threshold coatings for M1 and diamond would also Increase the output electric power with no damages. Then, the NIR laser within the 2nd Stokes wavelength may be large adequate, as well as its very good beam quality, to make the ultimate DUV laser at 193 nm having a high average ability.

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On more info one other aspect, the facility scaling on the NIR laser is yet another factor to boost the ordinary electrical power of the 193-nm DUV laser. Due to 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 applied to make a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with getting relative higher power [21]. Not long ago, a diamond Raman laser confirmed its means in achieving a higher energy as well as a large conversion efficiency at the 1st Stokes of the 1-μm laser [22,23], which implies the chance to generally be used from the 193-nm DUV laser era as a result of its higher Raman get and large frequency change.

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The heartbeat duration of the next Stokes gentle was shortened to 5 ns as proven in Figure 7a, an individual-shot photo within the oscilloscope, which can be a typical phenomenon in Raman laser [forty four] while the pulse period of your pump laser was 10 ns.

What's more, combining the stable-state laser with other nonlinear approach including stimulated Raman scattering, NIR lasers may very well be accomplished at new wavelengths with large ability and higher beam excellent, which was tested through the evidence-of-basic principle experiment. This Raman laser plan provides a brand new path to the high-electrical power DUV laser, especially within the wavelength of 193 nm.

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The conversion performance from elementary NIR to DUV is from 5% to 36% based on the reported ends in Table 1. Increasing the conversion effectiveness will lessen the burden on the look and set up of the fundamental laser amplifier and also the electric ability usage. A fantastic beam quality of the fundamental laser may even add towards the rising of the conversion efficiency and also the right electric power depth from the NIR and eco-friendly laser while in the SHG and FHG system, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [12], which corresponds for the conversion efficiency of 35% from fundamental to DUV.

The event from the 193-nm laser was shown by phases of SFG. In an effort to scale the DUV laser power properly, a new notion of your 193-nm DUV laser generation is introduced according to the diamond Raman laser.