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As an example, the current concave OC could be replaced by a airplane mirror which could mitigate the facility density about the surface area of M1 along with the diamond. Additionally, making use of higher problems threshold coatings for M1 and diamond would also Enhance the output electric power without any damages. Then, the NIR laser within the 2nd Stokes wavelength could be significant adequate, and also its very good beam high-quality, to deliver the final DUV laser at 193 nm that has a superior common power.
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LBO is also an excellent nonlinear crystal which is always placed on the SHG in the NIR on the eco-friendly. The DUV laser will likely be realized by two phases of SFG in the LBO crystals given that there is absolutely no period-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV specifically by SHG [16]. Just lately, the NSBBF crystal has also proven its probable to acquire a higher conversion performance from 532 nm to 266 nm. The walk-off angle and deff of the NSBBF are Just about comparable to Those people of CLBO [17].
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The heartbeat period of the more info next Stokes light was shortened to 5 ns as shown in Determine 7a, just one-shot photo from your oscilloscope, and that is a common phenomenon in Raman laser [forty four] although the heart beat duration of your pump laser was 10 ns.
Also, combining the strong-point out laser with other nonlinear procedure for instance stimulated Raman scattering, NIR lasers might be realized at new wavelengths with high electricity and superior beam high quality, which was examined through the proof-of-basic principle experiment. This Raman laser plan provides a fresh path to the superior-energy DUV laser, Specially for the wavelength of 193 nm.
The beam profile revealed in Figure 7b demonstrated a very good beam top quality as on the list of merits of Raman laser, which would be useful to crank out a 193-nm DUV laser with a top quality beam.
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The development of your 193-nm laser was demonstrated by levels of SFG. So that you can scale the DUV laser electricity effectively, a whole new concept on the 193-nm DUV laser technology is presented determined by the diamond Raman laser.