A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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We summarized The existing development standing from the large-energy DUV laser the two with the wavelength of FHG of your one-μm laser and at 193 nm. The the latest development from the sound-state/fiber laser, as well as the nonlinear optical crystals, prompts not merely the normal electricity but will also the beam good quality (coherence) from the DUV lasers to an unparalleled level.
By way of example, The present concave OC could get replaced by a airplane mirror which could mitigate the power density around the surface of M1 and the diamond. In addition, making use of significant hurt threshold coatings for M1 and diamond would also Enhance the output energy with none damages. Then, the NIR laser for the 2nd Stokes wavelength could possibly be higher enough, together with its excellent beam high quality, to deliver the final DUV laser at 193 nm with a significant common ability.
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LBO can also be a superb nonlinear crystal which is usually applied to the SHG from your NIR towards the green. The DUV laser is often recognized by two phases of SFG inside the LBO crystals since there isn't any phase-matching angle for LBO to transform the environmentally friendly laser at 515 nm or 532 nm into the DUV instantly by SHG [sixteen]. Not long ago, the NSBBF crystal has also demonstrated its prospective to acquire a substantial conversion efficiency from 532 nm to 266 nm. The stroll-off angle and deff with the NSBBF are Practically similar to All those of CLBO [seventeen].
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Inside the scientific and industrial applications, the beam excellent from the DUV laser can be an essential parameter. Notably, the beam high-quality in the DUV laser dramatically impacts the laser machining effects. The beam high quality on the DUV laser is set by that of the fundamental laser as well as crystal with the frequency conversion. Not too long ago, a significant-ability DUV laser (>ten W) at 258 nm was claimed which has a beam high-quality of M2 < one.5, which was generated by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring about a far better laser machining result as compared to the former DUV lasers with larger sized M2.
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The beam profile shown in Figure 7b demonstrated a very good beam high quality as among the list of deserves of Raman website laser, which would be useful to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The successful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as huge as that of KDP. CLBO crystals may be grown in the stoichiometric soften with reduced viscosity.
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