The 2-Minute Rule for CLBO Crystal
The 2-Minute Rule for CLBO Crystal
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However, to be able to procedure the crystal is very State-of-the-art manufacturing techniques are essential. Because the dawn of this crystal, working on this obstacle, we are now the only real firm on the planet which might be processed In this particular crystal.
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In accordance with the proof-of-theory experiment, the conversion performance of 23% implied the possibility of accomplishing higher-power at the 2nd Stokes wavelength of the Raman laser. When the pump laser of 1078 nm could possibly be acquired at the standard ability of fifty W, the output electric power of its 2nd Stokes wavelength at 1512 nm may very well be a lot more than 10 W. The design of the Raman laser cavity ought to be optimized as a way to steer clear of the damage of the M1 and diamond area.
The standard ability of your NIR laser nonetheless has the possible to become enhanced to tens of watts for example 70 W [26] In case the double-pass configuration could be used to the Yb:YAG SCF amplifier phase. That's why, In the event the conversion performance of 31% from NIR to DUV could possibly be continue to taken care of at this higher electricity condition, the common output electric power from the DUV laser at 258 nm may very well be greater than 20 W, which would become a extraordinary electrical power amount for the DUV laser and cause the unanticipated DUV laser machining success. Furthermore, for top-power DUV laser, the UV destruction on the nonlinear crystal, such as the windows for CLBO crystal and also the mirrors, is another essential parameter for long-term and secure Procedure.
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Equally the 1040 nm and 1078 nm laser originate from one particular dual-wavelength Yb-doped fiber laser. Each and every laser is amplified by stages of fiber amplifier and Yb-doped materials amplifier, respectively.
On the opposite aspect, the power scaling of the NIR laser is yet another component to improve the common energy of the 193-nm DUV laser. Due to the deficiency of the large-electricity amplification Remedy of the NIR laser (such as at 1553 nm), nonlinear frequency processes such as optical parameter oscillation (OPO) could be placed on create a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength in addition to acquiring relative greater electricity [21]. Recently, a diamond Raman laser showed its potential in acquiring a higher electricity along with a substantial conversion performance within the 1st Stokes of the 1-μm laser [22,23], which implies the possibility being utilized from the 193-nm DUV laser era on account of its higher Raman obtain and huge frequency shift.
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The heartbeat duration of the 2nd Stokes mild was shortened to five ns as demonstrated in Figure 7a, only one-shot photo from your oscilloscope, which is a standard phenomenon in Raman laser [44] when the pulse length from the pump laser was ten ns.
Moreover, combining the strong-condition laser with other nonlinear system for example stimulated Raman scattering, NIR lasers may very well be accomplished at new wavelengths with substantial ability and higher beam good quality, which was analyzed via the evidence-of-basic principle experiment. This Raman laser plan provides a brand new route to the higher-energy DUV laser, Specifically at the wavelength of 193 nm.
The beam profile demonstrated in Determine 7b shown a very good beam high quality as one of several deserves of Raman laser, which would be helpful to make a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches one hundred eighty nm. The successful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice here as significant as that of KDP. CLBO crystals is usually grown in the stoichiometric soften with decrease viscosity.
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