CLBO Crystal Can Be Fun For Anyone

All-reliable-point out ultraviolet lasers are greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of smaller quantity, extensive existence, substantial effectiveness, fantastic beam good quality, vast tuning and narrow spectral line, etcetera. Making use of large energy in close proximity to-infrared coherent gentle resource as the basic frequency resource determined by nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is regarded as a very important technique to develop the ultraviolet coherent light resource.

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We summarized The present enhancement standing of the large-electric power DUV laser equally within the wavelength of FHG from the 1-μm laser and at 193 nm. The latest advancement with the solid-point out/fiber laser, plus the nonlinear optical crystals, prompts don't just the typical electricity but in addition the beam quality (coherence) with the DUV lasers to an unparalleled amount.

For illustration, The existing concave OC could get replaced by a aircraft mirror which could mitigate the ability density around the surface of M1 and also the diamond. What's more, applying large damage threshold coatings for M1 and diamond would also Enhance the output ability with no damages. Then, the NIR laser at the 2nd Stokes wavelength may very well be higher more than enough, along with its superior beam top quality, to make the ultimate DUV laser at 193 nm having a large average electric power.

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Both the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Every laser is amplified by levels of fiber amplifier and Yb-doped elements amplifier, respectively.

On the other side, the facility scaling in the NIR laser is another element to boost the typical power of your 193-nm DUV laser. Due to the not enough the substantial-electrical power amplification Answer of your NIR laser (one example is at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength in addition to acquiring relative bigger electrical power [21]. A short while ago, a diamond Raman laser showed its capability in attaining a significant energy along with a higher conversion effectiveness for the 1st Stokes of the 1-μm laser [22,23], which implies the likelihood to be applied inside the 193-nm DUV laser era as a consequence of its substantial Raman attain and large frequency change.

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During the scientific and industrial apps, the beam good quality from the DUV laser can also be a very important parameter. Specially, the beam quality of your DUV laser substantially affects the laser machining effects. The beam high quality with the DUV laser is determined by that of the basic laser as well as crystal to the frequency conversion. A short while ago, a large-power DUV laser (>10 W) at 258 nm was described having a beam excellent of M2 < one.five, which was created by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would result in an even better laser machining result when compared to the past DUV lasers with larger sized M2.

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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet get more info harmonics in the Nd:YAG elementary laser wavelength. In an effort to increase the injury threshold, minimal CLBO surface roughness, by extremely-precision machining, is required. Because the CLBO crystal has quick hydroscopic response and micro scratches in machining, extremely-exact machining of the CLBO crystal is often a challenging technical dilemma.

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The conversion effectiveness from fundamental NIR to DUV is from five% to 36% according to the claimed ends in Table 1. Increasing the conversion effectiveness will reduce the load on the look and setup of the elemental laser amplifier in addition to the electric powered electrical power usage. An excellent beam high-quality of the fundamental laser can even add for the raising of the conversion efficiency together with the appropriate electricity depth of the NIR and green laser within the SHG and FHG system, respectively. The very best conversion efficiencies from NIR to environmentally friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all around 50%, respectively [twelve], which corresponds into the conversion efficiency of 35% from elementary to DUV.

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