5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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All-good-point out ultraviolet lasers are broadly used in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of compact volume, extended life, high performance, superior beam top quality, vast tuning and slim spectral line, and so on. Utilizing high power near-infrared coherent light-weight supply as the basic frequency resource determined by nonlinear tuning engineering, generating ultraviolet coherent radiation by multistage frequency conversion is considered a very important approach to develop the ultraviolet coherent light-weight source.
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We summarized The existing progress position from the higher-power DUV laser both for the wavelength of FHG with the one-μm laser and at 193 nm. The new enhancement with the strong-state/fiber laser, along with the nonlinear optical crystals, prompts not only the normal ability but additionally the beam excellent (coherence) on the DUV lasers to an unparalleled degree.
The true secret difficulty of ultraviolet coherent gentle resource primarily focuses on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is probably the problems for frequency transformation, so the growth, dimension, problems resistance, conversion efficiency and allowable parameter range of nonlinear optical crystal are demanded An increasing number of.
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Due to thermal lens outcome inside the good-point out lasers, In the event the heating management is inadequate, It's not at all simple to acquire the stable-point out laser that has a higher electrical power and also a higher beam high-quality at the same time. A short while ago, with the event of the thin disk laser and one-crystal fiber (SCF) laser, a substantial-power laser at the basic wavelength (one μm) were realized with a fantastic beam top quality Despite a TEM00 mode beam [4,24], which might be very good candidates for the basic in the DUV laser more info era. Yet another candidate for the elemental could be the higher-ability fiber laser which could possibly be attained by coherent beam mix with M2 value less than one.
On another facet, the power scaling in the NIR laser is yet another element to increase the typical power of the 193-nm DUV laser. A result of the insufficient the superior-electricity amplification Remedy of the NIR laser (such as at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) may very well be applied to develop a wavelength converter by shifting the wavelength from one μm to the specified wavelength together with obtaining relative bigger electricity [21]. Just lately, a diamond Raman laser showed its ability in acquiring a substantial ability as well as a superior conversion efficiency at the 1st Stokes with the one-μm laser [22,23], which implies the possibility to get utilized from the 193-nm DUV laser generation as a result of its large Raman achieve and huge frequency change.
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Additionally, combining the stable-state laser with other nonlinear method for instance stimulated Raman scattering, NIR lasers could possibly be obtained at new wavelengths with high electric power and significant beam excellent, which was analyzed through the evidence-of-theory experiment. This Raman laser plan gives a fresh route to the significant-electricity DUV laser, Primarily on the wavelength of 193 nm.
Tunable ultraviolet laser supply determined by reliable-state dye laser know-how and CsLiB6O10 harmonic era
The conversion efficiency from essential NIR to DUV is from 5% to 36% according to the described brings about Table one. Increasing the conversion efficiency will lessen the stress on the look and set up of the fundamental laser amplifier as well as the electric electricity intake. A fantastic beam quality of the fundamental laser can even add on the increasing from the conversion effectiveness together with the right ability depth with the NIR and inexperienced laser while in the SHG and FHG system, respectively. The best conversion efficiencies from NIR to inexperienced and green to DUV laser by use of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds towards the conversion performance of 35% from basic to DUV.
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