Nevertheless, in order to system the crystal is quite Sophisticated producing procedures are demanded. Since the dawn of the crystal, focusing on this challenge, we at the moment are the only real organization on the earth that could be processed With this crystal.
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The important thing dilemma of ultraviolet coherent light-weight supply mainly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the conditions for frequency transformation, so The expansion, sizing, damage resistance, conversion performance and allowable parameter choice of nonlinear optical crystal are expected more and more.
On the flip side, the beam high quality of the bigger electricity DUV laser would become worse because of additional critical thermal and nonlinear effects. That's why, the frequency conversion procedures ought to be thoroughly designed to mitigate the aforementioned results. Consequently, a superior-energy DUV laser for the FHG of one μm with a fantastic beam excellent may very well be received and can be useful for acquiring the shorter wavelength DUV lasers including 193 nm by SFG.
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On another aspect, the facility scaling from the NIR laser is another element to increase the average power of your 193-nm DUV laser. Mainly because of the deficiency of the substantial-electrical power amplification solution of your NIR laser (for instance at 1553 nm), nonlinear frequency procedures including optical parameter oscillation (OPO) may be placed on develop a wavelength converter by shifting the click here wavelength from one μm to the desired wavelength and also getting relative greater electric power [21]. Recently, a diamond Raman laser showed its potential in achieving a large power as well as a substantial conversion effectiveness with the 1st Stokes of the one-μm laser [22,23], which means the chance to get applied within the 193-nm DUV laser technology on account of its substantial Raman attain and enormous frequency shift.
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The pulse length of the second Stokes gentle was shortened to five ns as shown in Figure 7a, only one-shot image with the oscilloscope, that's a common phenomenon in Raman laser [44] even though the heart beat duration of the pump laser was 10 ns.
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The beam profile revealed in Determine 7b shown an excellent beam top quality as one of several merits of Raman laser, which would be advantageous to produce a 193-nm DUV laser with a high quality beam.
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