CLBO Crystal Secrets
CLBO Crystal Secrets
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All-reliable-condition ultraviolet lasers are actually commonly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medication for the advantages of small quantity, very long everyday living, significant effectiveness, very good beam top quality, vast tuning and narrow spectral line, etcetera. Making use of substantial electrical power near-infrared coherent light-weight source as the elemental frequency source based on nonlinear tuning technology, generating ultraviolet coherent radiation by multistage frequency conversion is regarded as a crucial approach to create the ultraviolet coherent mild resource.
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The normal electrical power in the NIR laser still has the likely being enhanced to tens of watts including 70 W [26] Should the double-pass configuration could be used for that Yb:YAG SCF amplifier stage. As a result, When the conversion performance of 31% from NIR to DUV might be nonetheless maintained at this higher electric power ailment, the typical output energy with the DUV laser at 258 nm may very well be much more than twenty W, which might be a impressive power level for your DUV laser and bring about the unanticipated DUV laser machining results. In addition, for high-electricity DUV laser, the UV injury on the nonlinear crystal, such as the Home windows for CLBO crystal along with the mirrors, is another important parameter for long-term and stable operation.
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As a result of thermal lens result inside the sound-state lasers, Should the heating management is insufficient, it is not uncomplicated to get the solid-point out laser having a high power and a superior beam excellent concurrently. Lately, with the event of The skinny disk laser and one-crystal fiber (SCF) laser, a large-power laser at the basic wavelength (one μm) had been recognized with a very good beam high quality In spite of a TEM00 manner beam [four,24], which would be fantastic candidates for the elemental from the DUV laser era. A different prospect for the fundamental may be the higher-electricity fiber laser which could be reached by coherent beam blend with M2 benefit a lot less than 1.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics with the Nd:YAG basic laser wavelength. So as to enhance the hurt threshold, minimal CLBO surface area roughness, by ultra-precision machining, is required. As the CLBO crystal has simple hydroscopic response and micro scratches in machining, extremely-exact machining with the CLBO crystal is a challenging complex difficulty.
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Its UV absorption edge reaches 180 nm. The productive nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as significant as that of KDP. CLBO crystals may be developed through the stoichiometric soften with lower viscosity.
The development in the 193-nm laser was shown by levels of SFG. As a way to scale the DUV laser ability successfully, a whole new principle of your 193-nm DUV laser technology is introduced based on the diamond Raman laser.