5 Easy Facts About CLBO Crystal Described
5 Easy Facts About CLBO Crystal Described
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All-solid-point out ultraviolet lasers have already been commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of tiny quantity, long lifetime, significant efficiency, very good beam excellent, vast tuning and slim spectral line, and so on. Employing significant electric power around-infrared coherent light resource as the basic frequency resource based on nonlinear tuning technologies, generating ultraviolet coherent radiation by multistage frequency conversion is considered to be a significant strategy to establish the ultraviolet coherent mild supply.
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We summarized The existing development position on the high-electricity DUV laser both equally within the wavelength of FHG of your one-μm laser and at 193 nm. The modern progress on the sound-state/fiber laser, together with the nonlinear optical crystals, prompts not just the standard electrical power but will also the beam high quality (coherence) on the DUV lasers to an unparalleled amount.
The normal electricity in the NIR laser however has the likely for being enhanced to tens of watts for instance 70 W [26] In case the double-go configuration may very well be utilized for the Yb:YAG SCF amplifier stage. As a result, If your conversion efficiency of 31% from NIR to DUV can be even now maintained at this better electricity condition, the typical output electrical power on the DUV laser at 258 nm can be over 20 W, which might certainly be a outstanding electricity stage for that DUV laser and produce the unanticipated DUV laser machining results. Also, for top-ability DUV laser, the UV problems of your nonlinear crystal, such as the Home windows for CLBO crystal plus the mirrors, is yet another vital parameter for long term and secure Procedure.
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LBO is additionally an excellent nonlinear crystal which is usually applied to the SHG through the NIR into the environmentally friendly. The DUV laser is generally understood by two phases of SFG while in the LBO crystals considering the fact that there is not any phase-matching angle for LBO to convert the eco-friendly laser at 515 nm or 532 nm on the DUV instantly by SHG [sixteen]. Not long ago, the NSBBF crystal has also proven its opportunity to acquire a high conversion performance from 532 nm to 266 nm. The stroll-off angle and deff on the NSBBF are Virtually much like those of CLBO [seventeen].
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The conversion effectiveness from fundamental NIR to DUV is from five% to 36% in accordance with the described results in Desk 1. Increasing the conversion effectiveness will lessen the load on the look and setup of the basic laser amplifier as well as the electrical power intake. A good beam good quality of the elemental laser may also lead to your increasing in the conversion effectiveness and the right energy depth of the NIR and eco-friendly laser during the SHG and FHG course of action, respectively. The best conversion efficiencies from NIR to inexperienced and inexperienced to DUV laser by utilization of CLBO crystal are 70% and close to 50%, respectively [twelve], which corresponds to your conversion effectiveness of 35% from basic to DUV.
The development of your 193-nm laser was demonstrated by phases of SFG. In order to scale the DUV laser electricity successfully, a different idea on the 193-nm DUV laser technology is presented determined by the diamond Raman laser.