Even so, in an effort to procedure the crystal is extremely Sophisticated producing techniques are demanded. Because the dawn of the crystal, working on this problem, we at the moment are the sole corporation on earth that can be processed in this crystal.
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We summarized The present improvement position from the high-electric power DUV laser the two at the wavelength of FHG in the 1-μm laser and at 193 nm. The current growth in the stable-condition/fiber laser, together with the nonlinear optical crystals, prompts don't just the normal electrical power but additionally the beam excellent (coherence) on the DUV lasers to an unparalleled stage.
The average electric power from the NIR laser even now has the potential for being enhanced to tens of watts including 70 W [26] Should the double-pass configuration may be used with the Yb:YAG SCF amplifier phase. Therefore, In case the conversion effectiveness of 31% from NIR to DUV can be still maintained at this higher electricity affliction, the standard output power of the DUV laser at 258 nm could be greater than twenty W, which might become a exceptional electrical power degree for your DUV laser and result in the unanticipated DUV laser machining results. What's more, for prime-energy DUV laser, the UV destruction on the nonlinear crystal, including the Home windows for CLBO crystal and the mirrors, is an additional critical parameter for long run and stable operation.
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The heart beat length of the second Stokes light was shortened to 5 ns as revealed in Figure 7a, one-shot photo within the oscilloscope, and that is a standard phenomenon in Raman laser [44] even though the heartbeat duration on the pump laser was ten ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics of your Nd:YAG basic laser wavelength. To be able to enhance the problems threshold, low CLBO surface area roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has simple hydroscopic check here response and micro scratches in machining, ultra-specific machining with the CLBO crystal is actually a tough complex difficulty.
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The conversion efficiency from essential NIR to DUV is from 5% to 36% in accordance with the noted brings about Table 1. Expanding the conversion effectiveness will lessen the load 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 fundamental laser may even lead into the growing in the conversion performance in addition to the appropriate electrical power intensity on the NIR and inexperienced laser from the SHG and FHG system, respectively. The best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and close to 50%, respectively [twelve], which corresponds for the conversion effectiveness of 35% from fundamental to DUV.
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