Detailed Notes on CLBO Crystal
Detailed Notes on CLBO Crystal
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All-good-condition ultraviolet lasers are already widely used in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of compact volume, long everyday living, superior effectiveness, very good beam high-quality, wide tuning and slender spectral line, and many others. Utilizing significant power close to-infrared coherent mild supply as the basic frequency source dependant on nonlinear tuning technology, creating ultraviolet coherent radiation by multistage frequency conversion is viewed as a vital approach to build the ultraviolet coherent light supply.
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We summarized The present growth standing of your higher-power DUV laser both for the wavelength of FHG of your 1-μm laser and at 193 nm. The latest improvement of your stable-condition/fiber laser, as well as the nonlinear optical crystals, prompts not just the typical electric power but also the beam quality (coherence) of the DUV lasers to an unprecedented level.
The main element challenge of ultraviolet coherent mild source largely focuses on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal has become the conditions for frequency transformation, so The expansion, sizing, hurt resistance, conversion performance and allowable parameter range of nonlinear optical crystal are essential Progressively more.
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A result of the thermal lens outcome during the strong-state lasers, Should the heating management is inadequate, It is far from uncomplicated to obtain the sound-state laser which has a substantial energy and a higher beam excellent concurrently. A short while ago, with the event of The skinny disk laser and single-crystal fiber (SCF) laser, a substantial-energy laser at the basic wavelength (1 μm) had been recognized with a very good beam high-quality In spite of a TEM00 method beam [4,24], which might be good candidates for the elemental from the DUV laser era. One more applicant for the basic would be the significant-ability fiber laser which may be accomplished by coherent beam mixture with M2 value fewer than 1.
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Moreover, combining the solid-condition laser with other nonlinear system such as stimulated Raman scattering, NIR lasers can be attained at new wavelengths with high electrical power and superior beam high quality, which was examined with the evidence-of-basic principle experiment. This Raman laser scheme delivers a completely new route to the higher-power DUV laser, Specially on the wavelength of 193 nm.
The beam profile shown in Figure 7b shown an excellent beam excellent as among the list of merits of Raman laser, which might be helpful to create a 193-nm DUV laser with a high quality beam.
Its UV absorption edge reaches 180 nm. The powerful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about 2 times as large as that of KDP. CLBO crystals may be developed from the stoichiometric melt with decrease viscosity.
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