Not known Factual Statements About CLBO Crystal
Not known Factual Statements About CLBO Crystal
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All-sound-condition ultraviolet lasers are actually widely Employed in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of smaller quantity, prolonged everyday living, high efficiency, good beam high-quality, vast tuning and narrow spectral line, etcetera. Making use of higher power in the vicinity of-infrared coherent gentle source as the elemental frequency source based on nonlinear tuning technological innovation, producing ultraviolet coherent radiation by multistage frequency conversion is considered to be a crucial solution to build the ultraviolet coherent light-weight source.
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We summarized The present improvement position of your significant-electrical power DUV laser both for the wavelength of FHG in the one-μm laser and at 193 nm. The new enhancement of your good-condition/fiber laser, plus the nonlinear optical crystals, prompts not simply the average electricity but will also the beam excellent (coherence) of your DUV lasers to an unparalleled degree.
For illustration, The existing concave OC could be replaced by a plane mirror which could mitigate the facility density about the surface of M1 and the diamond. Moreover, applying large damage threshold coatings for M1 and diamond would also Increase the output electricity without any damages. Then, the NIR laser for the 2nd Stokes wavelength could possibly be substantial sufficient, together with its great beam excellent, to generate the final DUV laser at 193 nm which has a high average electrical power.
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Due to thermal lens effect from the strong-point out lasers, When the heating administration is inadequate, It's not at all uncomplicated to obtain the reliable-point out laser with a high electrical power plus a higher beam good quality at the same time. Recently, with the development of The skinny disk laser and solitary-crystal fiber (SCF) laser, a significant-ability laser at the elemental wavelength (one μm) had been realized with a fantastic beam quality Despite a TEM00 method beam [4,24], which would be fantastic candidates for the elemental of your DUV laser generation. An additional candidate for the fundamental may be the substantial-electricity fiber laser which may very well be reached by coherent beam blend with M2 price below 1.
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Inside the scientific and industrial apps, the beam good quality on the DUV laser is likewise a significant parameter. Specially, the beam good quality in the DUV laser drastically has an effect on the laser machining success. The beam excellent on the DUV laser is determined by that of the elemental laser as well as the crystal for the frequency conversion. Not too long ago, a high-electric power DUV laser (>10 W) at 258 nm was documented with a beam excellent of M2 < one.5, which was produced by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would cause a better laser machining end result compared to the preceding DUV lasers with larger sized M2.
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The beam profile proven in Figure 7b demonstrated a fantastic beam high-quality as on the list of deserves of Raman laser, which might be beneficial to produce a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches one hundred eighty nm. The successful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as large as that of KDP. CLBO crystals is often developed from your stoichiometric soften with decrease viscosity.
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