Rumored Buzz on CLBO Crystal
Rumored Buzz on CLBO Crystal
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We summarized The existing progress standing on the large-energy DUV laser each within the wavelength of FHG in the 1-μm laser and at 193 nm. The the latest progress from the stable-state/fiber laser, together with the nonlinear optical crystals, prompts not just the standard energy and also the beam high quality (coherence) on the DUV lasers to an unprecedented degree.
The normal electric power in the NIR laser nonetheless has the opportunity to be improved to tens of watts for instance 70 W [26] If your double-go configuration may be utilized with the Yb:YAG SCF amplifier phase. Consequently, if the conversion performance of 31% from NIR to DUV could be nonetheless preserved at this greater ability affliction, the average output electricity of your DUV laser at 258 nm might be a lot more than twenty W, which might be a extraordinary electricity level to the DUV laser and result in the unanticipated DUV laser machining benefits. What's more, for high-electrical power DUV laser, the UV hurt of your nonlinear crystal, such as the windows for CLBO crystal as well as the mirrors, is an additional critical parameter for long run and steady operation.
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A result of the thermal lens result inside the strong-state lasers, In the event the heating management is inadequate, It isn't effortless to obtain the good-condition laser which has a substantial energy and also a higher beam excellent simultaneously. Not long ago, with the development of the thin disk laser and one-crystal fiber (SCF) laser, a higher-electric power laser at the elemental wavelength (1 μm) had been recognized with a great beam good quality Despite having a TEM00 mode beam [4,24], which would be very good candidates for the elemental on the DUV laser technology. Yet another applicant for the elemental is definitely the large-energy fiber laser which could possibly be attained by coherent beam mixture with M2 value less than one.
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In the scientific and industrial applications, the beam top quality in the DUV laser is additionally a crucial parameter. Specifically, the beam top quality from the DUV laser significantly has an effect on the laser machining effects. The beam high quality of the DUV laser is decided by that of the fundamental laser and the crystal for that frequency conversion. Not long ago, a large-ability DUV laser (>10 W) at 258 nm was claimed having a beam excellent of M2 < 1.5, which was produced by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would cause a far better laser machining consequence when compared with the previous DUV lasers with more substantial M2.
The heartbeat length of the next Stokes light-weight was shortened to five ns as shown in Figure 7a, an individual-shot photo through the oscilloscope, which can be a common phenomenon in Raman laser [forty four] although the heartbeat period on the pump laser was 10 ns.
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Its UV absorption edge reaches one hundred eighty nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as massive as that of KDP. CLBO crystals is often developed with the stoichiometric soften with lessen viscosity.
The development in the 193-nm laser was demonstrated by levels of SFG. In order to scale the DUV laser power effectively, a fresh principle in the 193-nm DUV laser generation is offered determined by the diamond Raman laser.