Examine This Report on CLBO Crystal
Examine This Report on CLBO Crystal
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All-good-point out ultraviolet lasers are actually extensively used in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of compact volume, extensive lifestyle, high performance, good beam quality, large tuning and slim spectral line, and so on. Utilizing substantial electrical power in the vicinity of-infrared coherent gentle source as the elemental frequency source based on nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is thought to be a crucial way to develop the ultraviolet coherent mild resource.
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In accordance with the evidence-of-principle experiment, the conversion efficiency of 23% implied the potential of accomplishing superior-power at the second Stokes wavelength of your Raman laser. In the event the pump laser of 1078 nm may be received at the common electricity of 50 W, the output electrical power of its 2nd Stokes wavelength at 1512 nm could possibly be over 10 W. The look of your Raman laser cavity should be optimized in order to steer clear of the hurt in the M1 and diamond surface.
The crucial element problem of ultraviolet coherent light source mainly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is probably the disorders for frequency transformation, so The expansion, dimensions, problems resistance, conversion effectiveness and allowable parameter array of nonlinear optical crystal are necessary An increasing number of.
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On the opposite side, the facility scaling with the NIR laser is an additional element to increase the ordinary electrical power with the 193-nm DUV laser. A result of the lack of the significant-electrical power amplification solution on the NIR laser (for instance at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) may very well be placed on develop a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to obtaining relative better energy [21]. Just lately, a diamond Raman laser confirmed its capability in attaining a significant power along with a substantial conversion effectiveness for the 1st Stokes of your one-μm laser [22,23], which means the chance being utilized during the 193-nm DUV laser technology thanks to its large Raman attain and huge frequency change.
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In addition, combining the good-state laser with other nonlinear course of action like stimulated Raman scattering, NIR lasers may very well be obtained at new wavelengths with higher electricity and superior beam quality, which was tested through the proof-of-theory experiment. This Raman laser scheme gives a fresh route to the high-electrical power DUV laser, Specially for the wavelength of 193 nm.
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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 here on the look and set up of the elemental laser amplifier in addition to the electrical ability consumption. A superb beam excellent of the elemental laser will also contribute towards the escalating with the conversion effectiveness as well as the right power intensity on the NIR and inexperienced laser in the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by usage of CLBO crystal are 70% and all-around fifty%, respectively [12], which corresponds towards the conversion efficiency of 35% from essential to DUV.
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