5 Essential Elements For CLBO Crystal
5 Essential Elements For CLBO Crystal
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All-reliable-state ultraviolet lasers happen to be broadly Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of compact volume, extended daily life, substantial efficiency, fantastic beam high-quality, huge tuning and narrow spectral line, etc. Employing significant electric power around-infrared coherent gentle resource as the basic frequency source depending on nonlinear tuning know-how, making ultraviolet coherent radiation by multistage frequency conversion is viewed as a very important technique to produce the ultraviolet coherent light source.
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According to the proof-of-basic principle experiment, the conversion efficiency of 23% implied the potential of acquiring large-electricity at the next Stokes wavelength from the Raman laser. In the event the pump laser of 1078 nm could be obtained at the typical energy of 50 W, the output power of its 2nd Stokes wavelength at 1512 nm could be more than ten W. The look of your Raman laser cavity need to be optimized so as to steer clear of the damage from the M1 and diamond surface.
The average ability with the NIR laser even now has the opportunity being enhanced to tens of watts which include 70 W [26] In case the double-go configuration may be utilized with the Yb:YAG SCF amplifier stage. For this reason, If your conversion efficiency of 31% from NIR to DUV can be nonetheless maintained at this bigger electric power issue, the normal output energy from the DUV laser at 258 nm could possibly be much more than twenty W, which would be considered a extraordinary electricity level for the DUV laser and bring on the unanticipated DUV laser machining results. Moreover, for top-electrical power DUV laser, the UV hurt with the nonlinear crystal, such as the windows for CLBO crystal as well as the mirrors, is an additional essential parameter for long-term and secure operation.
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Both equally the 1040 nm and 1078 nm laser come from a single dual-wavelength Yb-doped fiber laser. Each individual laser is amplified by phases of fiber amplifier and Yb-doped components amplifier, respectively.
On the opposite side, the power scaling in the NIR laser is yet another part to improve the ordinary electrical power with the 193-nm DUV laser. A result of the insufficient the superior-electricity amplification Resolution in the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) could possibly be placed on make a wavelength converter by shifting the wavelength from one μm to the specified wavelength together with getting relative greater electric power [21]. Lately, a diamond Raman laser showed its ability in acquiring a large electricity plus a superior conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which implies the possibility for being applied inside the 193-nm DUV laser era due to its large Raman obtain and large frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics of the Nd:YAG essential laser wavelength. So that you can greatly enhance 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 technical challenge.
The beam profile demonstrated in Determine 7b demonstrated a good beam good quality as one of the deserves of Raman laser, which might be helpful to deliver a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches a hundred and eighty nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals can be developed from your stoichiometric soften with decrease viscosity.
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