The smart Trick of CLBO Crystal That Nobody is Discussing
The smart Trick of CLBO Crystal That Nobody is Discussing
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The crucial element trouble of ultraviolet coherent gentle source predominantly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is without doubt one of the conditions for frequency transformation, so the growth, size, problems resistance, conversion performance and allowable parameter number of nonlinear optical crystal are required A lot more.
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LBO can be an outstanding nonlinear crystal which is often applied to the SHG through the NIR to the eco-friendly. The DUV laser will likely be realized by two stages of SFG within the LBO crystals because there is not any phase-matching angle for LBO to convert the green laser at 515 nm or 532 nm to your DUV instantly by SHG [sixteen]. Not long ago, the NSBBF crystal has also demonstrated its probable to get a large conversion efficiency from 532 nm to 266 nm. The stroll-off angle and deff of your NSBBF are Virtually similar to These of CLBO [seventeen].
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While in the scientific and industrial apps, the beam good quality in the DUV laser is additionally a crucial parameter. Especially, the beam quality on the DUV laser substantially affects the laser machining final results. The beam high quality of the DUV laser is decided by that of the basic laser and also the crystal with the frequency conversion. Just lately, a large-ability DUV laser (>10 W) at 258 nm was claimed by using a beam high quality of M2 < 1.five, which was generated by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would result in an improved laser machining outcome in comparison with the former DUV lasers with bigger M2.
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Tunable ultraviolet laser resource dependant on good-condition dye laser technological innovation and CsLiB6O10 harmonic era
The conversion efficiency from essential NIR to DUV is from 5% to 36% based on the reported leads to Desk one. Escalating the conversion efficiency will decrease the stress on the design and setup of the basic laser amplifier as well as the electric electricity use. A good beam top quality of the basic laser may even lead to your expanding of the conversion performance as well as the right power depth here with the NIR and inexperienced laser from the SHG and FHG approach, respectively. The very best conversion efficiencies from NIR to green and environmentally friendly to DUV laser by usage of CLBO crystal are 70% and all around 50%, respectively [twelve], which corresponds on the conversion efficiency of 35% from essential to DUV.
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