Rumored Buzz on CLBO Crystal
Rumored Buzz on CLBO Crystal
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We summarized the current enhancement standing of the superior-electrical power DUV laser each for the wavelength of FHG from the one-μm laser and at 193 nm. The current progress of your stable-state/fiber laser, in addition to the nonlinear optical crystals, prompts not only the normal energy but will also the beam top quality (coherence) of the DUV lasers to an unprecedented degree.
The typical electricity on the NIR laser even now has the likely for being improved to tens of watts such as 70 W [26] If your double-move configuration may be utilized for that Yb:YAG SCF amplifier stage. For this reason, When the conversion effectiveness of 31% from NIR to DUV could be even now maintained at this larger ability situation, the common output electric power in the DUV laser at 258 nm may very well be greater than twenty W, which might become a extraordinary energy degree for that DUV laser and produce the unanticipated DUV laser machining final results. Additionally, for top-power DUV laser, the UV damage of the nonlinear crystal, such as the Home windows for CLBO crystal as well as the mirrors, is an additional crucial parameter for long lasting and stable Procedure.
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As a result of thermal lens effect during the good-condition lasers, When the heating management is inadequate, It's not necessarily straightforward to acquire the stable-state laser using a high electric power plus a high beam quality concurrently. Recently, with the development of The skinny disk laser and one-crystal fiber (SCF) laser, a higher-ability laser at the fundamental wavelength (1 μm) had been recognized with a superb beam high-quality even with a TEM00 manner beam [4,24], which might be superior candidates for the elemental of the DUV laser technology. A different prospect for the elemental is definitely the high-power fiber laser which may very well be realized by coherent beam blend with M2 price below 1.
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Furthermore, combining the good-state laser with other nonlinear approach such as stimulated Raman scattering, NIR lasers could possibly be obtained at new wavelengths with higher electricity and significant beam quality, which was tested by the proof-of-principle experiment. This Raman laser scheme provides a fresh route to the higher-power DUV laser, Primarily on the wavelength of 193 nm.
The beam profile demonstrated in Determine 7b shown a fantastic beam quality as one of many merits of Raman laser, which might be valuable to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches a hundred and eighty nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as huge as that of KDP. CLBO crystals may be developed with the stoichiometric melt with lessen viscosity.
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