Even so, as a way to method the crystal is very State-of-the-art production procedures are essential. Since the dawn of the crystal, working on this problem, we are actually the only real organization on this planet that may be processed in this crystal.
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全固态紫外激光器以其体积小、寿命长、效率高、光束质量好、调谐范围宽、谱线窄等优点，广泛应用于机械探伤、光刻、微加工和医学等领域，等，利用大功率近红外相干光源作为基于非线性调谐技术的基频源，通过多级变频产生紫外相干辐射被认为是发展紫外相干光源的重要途径。紫外相干光源的关键问题是研制紫外波段的非线性光学变频晶体。非线性光学晶体是实现频率变换的条件之一，因此对非线性光学晶体的生长、尺寸、损伤电阻、转换效率和允许的参数范围提出了越来越高的要求。
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LBO is also a wonderful nonlinear crystal which is usually placed on the SHG from your NIR to your environmentally friendly. The DUV laser is normally recognized by two levels of SFG during the LBO crystals since there isn't any stage-matching angle for LBO to convert the green laser at 515 nm or 532 nm on the DUV specifically by SHG [16]. Just lately, the NSBBF crystal has also demonstrated its potential to get a substantial conversion effectiveness from 532 nm to 266 nm. The wander-off angle and deff of the NSBBF are Nearly similar to those of CLBO [seventeen].
On another side, the facility scaling of the NIR laser is another part to boost the average electricity on the 193-nm DUV laser. Mainly because of the insufficient the higher-electric power amplification Alternative on the NIR laser (for example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) could possibly be placed on establish a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength along with obtaining relative increased ability [21]. Not too long ago, a diamond Raman laser confirmed its means in acquiring a higher electricity as well as a superior conversion performance at the 1st Stokes from the 1-μm laser [22,23], which implies the possibility to become applied in the 193-nm DUV laser era thanks to its high Raman acquire and large frequency change.
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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 improve the damage threshold, small CLBO floor roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-precise machining of your CLBO crystal is often a difficult technological dilemma.
The beam profile shown in Figure 7b demonstrated a very good beam top quality as among the list of deserves of Raman laser, which might be valuable to crank out a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as huge as that of KDP. CLBO crystals is usually grown from your stoichiometric melt with decrease viscosity.
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