All-reliable-point out ultraviolet lasers are widely used in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of modest volume, long lifestyle, higher performance, excellent beam quality, vast tuning and slim spectral line, and so forth. Using large electric power close to-infrared coherent mild resource as the elemental frequency resource based on nonlinear tuning know-how, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be a crucial approach to develop the ultraviolet coherent light-weight source.
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We summarized The existing progress status of the significant-electricity DUV laser equally at the wavelength of FHG with the 1-μm laser and at 193 nm. The new advancement of your solid-point out/fiber laser, plus the nonlinear optical crystals, prompts not only the standard energy but will also the beam quality (coherence) with the DUV lasers to an unprecedented degree.
The average electricity of your NIR laser still has the likely for being improved to tens of watts such as 70 W [26] When the double-move configuration might be used with the Yb:YAG SCF amplifier stage. That's why, In the event the conversion effectiveness of 31% from NIR to DUV could be even now maintained at this increased ability issue, the standard output electrical power on the DUV laser at 258 nm could be greater than 20 W, which might be considered a impressive electricity amount for the DUV laser and bring about the unanticipated DUV laser machining effects. What's more, for high-energy DUV laser, the UV injury on the nonlinear crystal, including the windows for CLBO crystal as well as the mirrors, is an additional critical parameter for long run and stable Procedure.
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On the opposite side, the power scaling with the NIR laser is another component to raise the average ability on the 193-nm DUV laser. Mainly because of the insufficient the substantial-power amplification Remedy with the NIR laser (for example at 1553 nm), nonlinear frequency processes like optical parameter oscillation (OPO) may be applied to produce a wavelength converter by shifting the wavelength from one μm to the specified wavelength and getting relative bigger power [21]. Lately, a diamond Raman laser showed its ability in accomplishing a superior ability and a high conversion performance within the 1st Stokes of your 1-μm laser [22,23], which implies the chance being utilized inside the 193-nm DUV laser generation thanks to its substantial Raman acquire and enormous frequency shift.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics with the Nd:YAG basic laser wavelength. In an effort to boost the destruction threshold, minimal CLBO area roughness, by extremely-precision machining, is required. Because the CLBO crystal has straightforward more info hydroscopic response and micro scratches in machining, ultra-specific machining on the CLBO crystal is really a challenging complex issue.
Tunable ultraviolet laser supply depending on sound-condition dye laser engineering and CsLiB6O10 harmonic generation
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