The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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Compared to BBO it characteristics larger sized spectral and temperature acceptance, far better angle tolerance, and also a lesser stroll-off angle. from 3289 $ supply
We summarized The present improvement position of your substantial-electrical power DUV laser the two on the wavelength of FHG from the one-μm laser and at 193 nm. The new progress with the reliable-point out/fiber laser, and also the nonlinear optical crystals, prompts not simply the average energy but will also the beam top quality (coherence) with the DUV lasers to an unparalleled level.
For illustration, the current concave OC could get replaced by a aircraft mirror which could mitigate the power density within the surface area of M1 and also the diamond. Moreover, working with substantial damage threshold coatings for M1 and diamond would also Increase the output energy with none damages. Then, the NIR laser on the 2nd Stokes wavelength might be significant sufficient, and its excellent beam high-quality, to create the ultimate DUV laser at 193 nm with a substantial ordinary energy.
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LBO is additionally an excellent nonlinear crystal which is always placed on the SHG within the NIR towards the inexperienced. The DUV laser will likely be realized by two stages of SFG inside the LBO crystals considering the fact that there isn't any period-matching angle for LBO to convert the inexperienced laser at 515 nm or 532 nm towards the DUV specifically by SHG [sixteen]. A short while ago, the NSBBF crystal has also revealed its potential to acquire a significant conversion effectiveness from 532 nm to 266 nm. The stroll-off angle and click here deff from the NSBBF are Nearly similar to These of CLBO [seventeen].
On one other aspect, the power scaling of the NIR laser is yet another part to improve the average electrical power of the 193-nm DUV laser. Because of the deficiency of the substantial-ability amplification solution with the NIR laser (such as at 1553 nm), nonlinear frequency procedures for example optical parameter oscillation (OPO) can be placed on create a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to obtaining relative higher ability [21]. Recently, a diamond Raman laser confirmed its means in attaining a significant power and a higher conversion efficiency on the 1st Stokes on the one-μm laser [22,23], which suggests the likelihood to generally be used during the 193-nm DUV laser era on account of its substantial Raman achieve and huge frequency shift.
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The conversion effectiveness from essential NIR to DUV is from five% to 36% based on the claimed leads to Table 1. Growing the conversion efficiency will lessen the stress on the design and set up of the elemental laser amplifier plus the electric electric power consumption. A good beam quality of the elemental laser will likely contribute on the escalating in the conversion performance and the appropriate energy intensity of your NIR and inexperienced laser within the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to green and green to DUV laser by utilization of CLBO crystal are 70% and all over fifty%, respectively [12], which corresponds to your conversion efficiency of 35% from basic to DUV.
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