The smart Trick of CLBO Crystal That No One is Discussing
The smart Trick of CLBO Crystal That No One is Discussing
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All-good-point out ultraviolet lasers are already greatly used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small quantity, prolonged lifetime, significant performance, excellent beam excellent, wide tuning and narrow spectral line, and many others. Using significant power close to-infrared coherent mild supply as the fundamental frequency supply depending on nonlinear tuning engineering, generating ultraviolet coherent radiation by multistage frequency conversion is viewed as an essential technique to build the ultraviolet coherent mild resource.
In comparison to BBO it characteristics more substantial spectral and temperature acceptance, better angle tolerance, as well as a scaled-down wander-off angle. from 3289 $ supply
We summarized The existing improvement standing in the substantial-power DUV laser the two at the wavelength of FHG of the one-μm laser and at 193 nm. The new advancement on the strong-state/fiber laser, along with the nonlinear optical crystals, prompts don't just the common electric power and also the beam top quality (coherence) on the DUV lasers to an unparalleled stage.
As an illustration, the current concave OC could get replaced by a airplane mirror which could mitigate the facility density to the surface of M1 and also the diamond. What's more, applying significant damage threshold coatings for M1 and diamond would also Enhance the output energy with none damages. Then, the NIR laser with the 2nd Stokes wavelength might be superior ample, and its excellent beam quality, to make the ultimate DUV laser at 193 nm that has a substantial ordinary power.
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Both of those the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Every laser is amplified by levels of fiber amplifier and Yb-doped elements amplifier, respectively.
On one other aspect, the power scaling from the NIR laser is yet another facet to raise the common energy from the 193-nm DUV laser. Because of the not enough the superior-electricity amplification Alternative with the NIR laser (by way of example at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength in addition to acquiring relative bigger electrical power [21]. A short while ago, a diamond Raman laser showed its means in acquiring a higher electricity and also a high conversion efficiency in the 1st Stokes from the 1-μm laser [22,23], which implies the possibility to get utilized from the 193-nm DUV laser technology on account of its large Raman obtain and enormous frequency change.
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Moreover, combining the stable-point out laser with other nonlinear procedure for example stimulated Raman scattering, NIR lasers can be accomplished at new wavelengths with large electricity and superior beam high quality, which was tested with the evidence-of-principle experiment. This Raman laser scheme supplies a different path to the significant-electricity DUV laser, Primarily at the wavelength of 193 nm.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% according to the described results in Desk 1. Raising the conversion efficiency will decrease the burden on the design and set up of the fundamental laser amplifier together with the electric electric power consumption. A superb beam high quality of the basic laser will likely contribute for the raising of the conversion efficiency and also the right electric power depth from the NIR and environmentally friendly laser within the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [twelve], which corresponds to your conversion performance of 35% from elementary to DUV.
The event from the 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser ability efficiently, a new notion of your 193-nm DUV laser generation is offered dependant on the diamond Raman laser.