A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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We summarized the current progress standing in the significant-electrical power DUV laser both of those for the wavelength of FHG on the 1-μm laser and at 193 nm. The new enhancement from the good-point out/fiber laser, plus the nonlinear optical crystals, prompts not just the typical energy but additionally the beam quality (coherence) of your DUV lasers to an unparalleled amount.
For illustration, The existing concave OC could get replaced by a plane mirror which could mitigate the facility density within the area of M1 along with the diamond. In addition, working with superior damage threshold coatings for M1 and diamond would also Increase the output power with none damages. Then, the NIR laser with the 2nd Stokes wavelength can be significant plenty of, and also its very good beam excellent, to produce the final DUV laser at 193 nm with a substantial regular power.
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LBO is likewise a great nonlinear crystal which is usually applied to the SHG within the NIR to the eco-friendly. The DUV laser is frequently recognized by two stages of SFG inside the LBO crystals due to the fact there is no period-matching angle for LBO to convert the inexperienced laser at 515 nm or 532 nm to the DUV directly by SHG [sixteen]. Lately, the NSBBF crystal has also shown its prospective to obtain a substantial conversion effectiveness from 532 nm to 266 nm. The wander-off angle and deff of the NSBBF are Nearly similar to Individuals of CLBO [17].
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The conversion effectiveness from fundamental NIR to DUV is from 5% to 36% based on the documented leads to Table one. Expanding the conversion efficiency will decrease the burden on the look and setup of the basic laser amplifier as well as the electric powered electric power use. A very good beam top quality of the elemental laser will likely contribute on the expanding in the conversion performance click here as well as the right electricity intensity from the NIR and eco-friendly laser while in the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to inexperienced and eco-friendly to DUV laser by usage of CLBO crystal are 70% and close to fifty%, respectively [12], which corresponds for the conversion performance of 35% from fundamental to DUV.
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