5 Easy Facts About CLBO Crystal Described
5 Easy Facts About CLBO Crystal Described
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In accordance with the proof-of-basic principle experiment, the conversion performance of 23% implied the possibility of obtaining significant-power at the 2nd Stokes wavelength of your Raman laser. If the pump laser of 1078 nm could possibly be obtained at the common electricity of fifty W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may very well be a lot more than 10 W. The look in the Raman laser cavity should be optimized in order to stay away from the problems on the M1 and diamond surface area.
The average electric power from the NIR laser however has the prospective being improved to tens of watts which include 70 W [26] In the event the double-go configuration could possibly be used for the Yb:YAG SCF amplifier stage. That's why, Should the conversion efficiency of 31% from NIR to DUV might be nevertheless preserved at this increased ability issue, the standard output ability of the DUV laser at 258 nm could be more than twenty W, which might be described as a impressive electrical power level for the DUV laser and result in the unanticipated DUV laser machining results. Moreover, for top-electric power DUV laser, the UV problems in the nonlinear crystal, such as the windows for CLBO crystal and the mirrors, is yet another essential parameter for long-lasting and stable Procedure.
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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 resources amplifier, respectively.
On another side, the facility scaling on the NIR laser is an additional factor to raise the typical energy of your 193-nm DUV laser. Mainly because of the lack of the higher-ability amplification Resolution from the NIR laser (such as at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) could possibly be applied to produce a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength together with obtaining relative larger ability [21]. Just lately, a diamond Raman laser confirmed its capability in obtaining a superior energy plus a significant conversion performance within the 1st Stokes with the one-μm laser [22,23], which suggests the possibility for being utilized while in the 193-nm DUV laser era as a consequence of its superior Raman attain and enormous frequency shift.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics in the Nd:YAG fundamental laser wavelength. To be able to enhance the problems threshold, lower CLBO surface roughness, by extremely-precision machining, is needed. As the CLBO crystal has straightforward hydroscopic response and micro scratches in machining, ultra-exact machining from the CLBO crystal is usually a hard technological difficulty.
The beam profile revealed in Figure 7b demonstrated a fantastic beam good quality as one of the merits of Raman laser, which might be advantageous to create 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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