The best Side of CLBO Crystal

The best Side of CLBO Crystal

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All-solid-point out ultraviolet lasers are already broadly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of tiny volume, long lifetime, significant efficiency, superior beam good quality, vast tuning and slim spectral line, and many others. Making use of significant ability in close proximity to-infrared coherent light-weight supply as the fundamental frequency supply based on nonlinear tuning technological know-how, building ultraviolet coherent radiation by multistage frequency conversion is considered to be a significant approach to create the ultraviolet coherent gentle source.

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The key dilemma of ultraviolet coherent gentle source mostly focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the disorders for frequency transformation, so The expansion, sizing, destruction resistance, conversion performance and allowable parameter variety of nonlinear optical crystal are needed An increasing number of.

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A result of the thermal lens effect while in the strong-condition lasers, In the event the heating management is inadequate, it is not uncomplicated to get the strong-condition laser with a significant electrical power and also a substantial beam quality at the same time. Recently, with the event of the thin disk laser and solitary-crystal fiber (SCF) laser, a high-electricity laser at the elemental wavelength (one μm) had been recognized with a fantastic beam excellent Despite having a TEM00 mode beam [4,24], which might be great candidates for the basic with the DUV laser technology. An additional candidate for the basic is the large-electric power fiber laser which can be obtained by coherent beam combination with M2 value under 1.

On the opposite aspect, the ability scaling on the NIR laser is yet another component to raise the common energy of the 193-nm DUV laser. Due to the deficiency of the large-energy amplification Alternative on the NIR laser (as an example at 1553 nm), nonlinear frequency processes such as optical parameter oscillation (OPO) may very well be applied to make a wavelength converter by shifting the wavelength from 1 μm to the desired wavelength and getting relative larger power [21]. Just lately, a diamond Raman laser showed its potential in achieving a significant power plus a significant conversion performance in the 1st Stokes on the one-μm laser [22,23], which implies the possibility to become applied within the 193-nm DUV laser generation as a result of its substantial Raman get and huge frequency shift.

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In the scientific and industrial applications, the beam quality of the DUV laser can also be an essential parameter. Specifically, the beam high quality from the DUV laser drastically impacts the laser machining final results. The beam high-quality with the DUV laser is set by that of the fundamental laser and the crystal with the frequency conversion. A short while ago, a significant-electrical power DUV laser (>10 W) at 258 nm was documented having a beam high-quality of M2 < 1.five, which was generated by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [13]. This laser would result in an improved laser machining result when compared to the previous DUV lasers with more substantial M2.

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The conversion performance from basic NIR to DUV is from five% to 36% based on the noted results in Table one. Rising the conversion efficiency will decrease the stress on the design and set up of the fundamental laser amplifier and also the electrical ability usage. A superb beam high quality of the basic laser will likely contribute on the expanding in the conversion effectiveness and the appropriate electrical power intensity on the NIR and environmentally friendly laser in the SHG and FHG process, respectively. The highest conversion efficiencies from NIR to eco-friendly and inexperienced to DUV laser by utilization of CLBO crystal are 70% and all over fifty%, respectively [twelve], which corresponds into the conversion performance of 35% from essential to DUV.

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