The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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We summarized the current enhancement position on the large-electrical power DUV laser both within the wavelength of FHG with the 1-μm laser and at 193 nm. The latest improvement with the sound-point out/fiber laser, in addition to the nonlinear optical crystals, prompts don't just the typical ability but in addition the beam high-quality (coherence) from the DUV lasers to an unprecedented degree.
The average power of your NIR laser however has the likely for being improved to tens of watts for instance 70 W [26] In case the double-pass configuration may very well be utilized for that Yb:YAG SCF amplifier stage. For this reason, In the event the conversion performance of 31% from NIR to DUV could be still preserved at this better power situation, the average output ability of the DUV laser at 258 nm could possibly be more than 20 W, which might be considered a remarkable electrical power degree for that DUV laser and cause the unanticipated DUV laser machining benefits. In addition, for high-electricity DUV laser, the UV injury of your nonlinear crystal, including the Home windows for CLBO crystal along with the mirrors, is yet another vital parameter for long-term and stable operation.
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Each the 1040 nm and 1078 nm laser originate from 1 twin-wavelength Yb-doped fiber laser. Every laser is amplified by levels of fiber amplifier and Yb-doped supplies amplifier, respectively.
On one other aspect, the facility scaling on the NIR laser is another facet to increase the regular electricity on the 193-nm DUV laser. Because of the deficiency of the superior-electricity amplification Resolution in the NIR laser (by way of example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) can be applied to establish a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength in addition to acquiring relative greater electricity [21]. Not long ago, a diamond Raman laser confirmed its capacity in attaining a significant electrical power and a high conversion effectiveness in the 1st Stokes of the one-μm laser [22,23], which suggests the chance to become applied within the website 193-nm DUV laser technology due to its higher Raman gain and large frequency change.
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Moreover, combining the reliable-point out laser with other nonlinear procedure for instance stimulated Raman scattering, NIR lasers might be realized at new wavelengths with high electrical power and substantial beam high-quality, which was tested with the evidence-of-basic principle experiment. This Raman laser plan presents a new route to the higher-electrical power DUV laser, Specially with the wavelength of 193 nm.
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