A Simple Key For CLBO Crystal Unveiled
A Simple Key For CLBO Crystal Unveiled
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All-good-state ultraviolet lasers have already been broadly used in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of little volume, very long daily life, superior efficiency, superior beam high-quality, huge tuning and slim spectral line, etc. Employing superior ability close to-infrared coherent light-weight source as the elemental frequency source according to nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is regarded as a significant way to build the ultraviolet coherent mild resource.
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Based on the evidence-of-basic principle experiment, the conversion performance of 23% implied the possibility of achieving large-electricity at the next Stokes wavelength of the Raman laser. When the pump laser of 1078 nm may be received at the normal electric power of fifty W, the output energy of its 2nd Stokes wavelength at 1512 nm might be greater than 10 W. The design with the Raman laser cavity should be optimized in order to steer clear of the destruction on the M1 and diamond area.
The real key problem of ultraviolet coherent light source mainly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the problems for frequency transformation, so the growth, dimension, injury resistance, conversion efficiency and allowable parameter selection of nonlinear optical crystal are required Increasingly more.
On the flip side, the beam quality of this bigger electrical power DUV laser would come to be even worse because of a lot more major thermal and nonlinear results. For this reason, the frequency conversion procedures should be very carefully made to mitigate the aforementioned results. Consequently, a significant-ability DUV laser at the FHG of 1 μm with a superb beam quality could possibly be acquired and will be beneficial for getting the shorter wavelength DUV lasers which include 193 nm by SFG.
Each the 1040 nm and 1078 nm laser originate from a person twin-wavelength Yb-doped fiber laser. Every single laser is amplified by stages of fiber amplifier and Yb-doped materials amplifier, respectively.
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While in the scientific and industrial programs, the beam excellent with the DUV laser is likewise a crucial parameter. Especially, the beam quality with the DUV laser considerably impacts the laser machining results. The beam high-quality on the DUV laser is determined by that of the basic laser and also the crystal with the frequency conversion. Just lately, a high-ability DUV laser (>10 W) at 258 nm was documented which has a beam high quality of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would bring about a far better laser machining outcome as compared to the prior DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics with the Nd:YAG basic laser wavelength. In an effort to increase the injury threshold, reduced CLBO surface area roughness, by extremely-precision machining, is required. Because the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-precise machining with the CLBO crystal can be a tough technological dilemma.
The beam profile proven in Figure 7b shown a fantastic beam quality as on the list of deserves of Raman laser, which would be helpful to crank out a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as substantial as that of KDP. CLBO crystals could be developed from your stoichiometric soften with reduce viscosity.
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