A Secret Weapon For CLBO Crystal
A Secret Weapon For CLBO Crystal
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The crucial element problem of ultraviolet coherent light-weight supply largely focuses on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the circumstances for frequency transformation, so The expansion, sizing, hurt resistance, conversion efficiency and allowable parameter number of nonlinear optical crystal are necessary An increasing number of.
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LBO is usually a fantastic nonlinear crystal which is always placed on the SHG from your NIR on the eco-friendly. The DUV laser is often recognized by two stages of SFG in the LBO crystals because there isn't any section-matching angle for LBO to transform the eco-friendly laser at 515 nm or 532 nm to your DUV directly by SHG [16]. Recently, the NSBBF crystal has also shown its potential to obtain a superior conversion effectiveness from 532 nm to 266 nm. The wander-off angle and deff from the NSBBF are Pretty much similar to All those of CLBO [seventeen].
On the opposite side, the ability scaling on the NIR laser is yet another element to improve the average energy with the 193-nm DUV laser. A result of the deficiency of the significant-power amplification Answer on the NIR laser (one example is at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) can be placed on establish a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also acquiring relative larger energy [21]. Lately, a diamond Raman laser showed its ability in reaching a large electrical power and a superior conversion effectiveness with the 1st Stokes from the one-μm laser [22,23], which suggests the possibility to get applied within the 193-nm DUV laser technology on account of its higher Raman gain and enormous frequency change.
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From the scientific and industrial applications, the beam quality of your DUV laser can be a vital parameter. Particularly, the beam excellent with the DUV laser significantly has an effect on the laser machining outcomes. The beam top quality with the DUV laser is decided by that of the elemental laser and the crystal for your frequency conversion. Just lately, a large-electricity DUV laser (>10 W) at 258 nm was noted having a beam top quality of M2 < 1.5, which here was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would lead to a far better laser machining outcome compared to the prior DUV lasers with larger M2.
The pulse length of the second Stokes light was shortened to 5 ns as revealed in Determine 7a, a single-shot photo with the oscilloscope, which happens to be a common phenomenon in Raman laser [44] when the heart beat period on the pump laser was ten ns.
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Tunable ultraviolet laser supply dependant on strong-point out dye laser technologies and CsLiB6O10 harmonic technology
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