Getting My CLBO Crystal To Work
Getting My CLBO Crystal To Work
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All-reliable-point out ultraviolet lasers have already been broadly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of tiny volume, long lifetime, high performance, superior beam excellent, extensive tuning and narrow spectral line, etcetera. Using higher energy in the vicinity of-infrared coherent light-weight resource as the basic frequency source depending on nonlinear tuning engineering, generating ultraviolet coherent radiation by multistage frequency conversion is viewed as an essential technique to acquire the ultraviolet coherent light-weight source.
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As an illustration, the current concave OC could be replaced by a airplane mirror which could mitigate the power density about the surface of M1 along with the diamond. What's more, working with higher injury threshold coatings for M1 and diamond would also Increase the output ability with none damages. Then, the NIR laser within the 2nd Stokes wavelength might be high enough, and its very good beam high quality, to deliver the final DUV laser at 193 nm with a substantial regular electrical power.
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The heartbeat period of the next Stokes light-weight was shortened to 5 ns as shown in Figure 7a, a single-shot photo in the oscilloscope, which happens to be a typical phenomenon in Raman laser [forty four] whilst the heartbeat length from the pump laser was ten ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics with the Nd:YAG elementary laser wavelength. So as to enrich the problems threshold, lower CLBO surface area roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has simple hydroscopic response and micro scratches in machining, extremely-precise machining of your CLBO crystal is often a challenging specialized dilemma.
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The conversion effectiveness from fundamental NIR to DUV is from 5% to 36% based on the claimed ends in Desk one. Increasing the conversion performance will reduce the burden on the look and set up of the fundamental laser amplifier together with the electric powered electrical power intake. A good beam top quality of the basic laser will likely contribute towards the increasing on the conversion effectiveness and the right electrical power intensity from the NIR and green laser within the SHG and FHG procedure, respectively. The highest conversion efficiencies from NIR to environmentally friendly and environmentally friendly to DUV laser by utilization of CLBO crystal are 70% and close to 50%, respectively [twelve], which corresponds on the conversion efficiency of 35% from essential to DUV.
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