Not known Factual Statements About CLBO Crystal
Not known Factual Statements About CLBO Crystal
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All-good-condition ultraviolet lasers are commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the benefits of tiny volume, long everyday living, substantial effectiveness, fantastic beam high-quality, large tuning and slender spectral line, etcetera. Making use of superior electric power around-infrared coherent light source as the elemental frequency source according to nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be a very important approach to produce the ultraviolet coherent light supply.
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We summarized The existing progress standing from the superior-ability DUV laser equally at the wavelength of FHG with the 1-μm laser and at 193 nm. The recent progress from the good-state/fiber laser, and also the nonlinear optical crystals, prompts not simply the average electric power but additionally the beam high-quality (coherence) in the DUV lasers to an unparalleled amount.
The standard ability of your NIR laser continue to has the probable being improved to tens of watts for instance 70 W [26] If your double-pass configuration could be utilized to the Yb:YAG SCF amplifier phase. That's why, When the conversion effectiveness of 31% from NIR to DUV might be however managed at this increased ability problem, the normal output energy of your DUV laser at 258 nm may be more than 20 W, which might certainly be a outstanding energy stage with the DUV laser and produce the unanticipated DUV laser machining results. Furthermore, for high-electrical power DUV laser, the UV injury in the nonlinear crystal, including the windows for CLBO crystal and the mirrors, is yet another vital parameter for long-lasting and steady operation.
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LBO is usually a fantastic nonlinear crystal which is often applied to the SHG from your NIR to your environmentally friendly. The DUV laser will likely be understood by two levels of SFG within the here LBO crystals due to the fact there is no phase-matching angle for LBO to convert the green laser at 515 nm or 532 nm towards the DUV immediately by SHG [16]. Not too long ago, the NSBBF crystal has also proven its opportunity to get a significant conversion performance from 532 nm to 266 nm. The wander-off angle and deff of your NSBBF are Pretty much comparable to Those people 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. Specially, the beam excellent in the DUV laser drastically affects the laser machining effects. The beam good quality from the DUV laser is decided by that of the fundamental laser as well as crystal for your frequency conversion. A short while ago, a significant-electrical power DUV laser (>ten W) at 258 nm was documented having a beam excellent of M2 < 1.5, which was produced by FHG of the Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would lead to an even better laser machining result when compared to the past DUV lasers with bigger M2.
The heartbeat duration of the 2nd Stokes mild was shortened to 5 ns as demonstrated in Figure 7a, only one-shot image within the oscilloscope, and that is a typical phenomenon in Raman laser [forty four] although the heart beat duration on the pump laser was ten ns.
In addition, combining the good-state laser with other nonlinear course of action for example stimulated Raman scattering, NIR lasers could be attained at new wavelengths with significant power and large beam good quality, which was analyzed from the proof-of-theory experiment. This Raman laser plan supplies a different path to the superior-energy DUV laser, Specifically with the wavelength of 193 nm.
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The event in the 193-nm laser was shown by stages of SFG. In an effort to scale the DUV laser power properly, a new notion with the 193-nm DUV laser technology is presented determined by the diamond Raman laser.