The Definitive Guide to CLBO Crystal
The Definitive Guide to CLBO Crystal
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All-reliable-condition ultraviolet lasers are already extensively used in the fields of mechanical flaw detection, lithography, micromachining and medicine for some great benefits of small quantity, very long life, high performance, very good beam quality, broad tuning and narrow spectral line, and many others. Utilizing significant electricity close to-infrared coherent light resource as the fundamental frequency resource determined by nonlinear tuning technological know-how, making ultraviolet coherent radiation by multistage frequency conversion is regarded as a significant method to acquire the ultraviolet coherent light supply.
As compared to BBO it functions much larger spectral and temperature acceptance, much better angle tolerance, as well as a scaled-down stroll-off angle. from 3289 $ supply
According to the proof-of-theory experiment, the conversion efficiency of 23% implied the potential for obtaining higher-electric power at the 2nd Stokes wavelength from the Raman laser. If your pump laser of 1078 nm might be obtained at the common ability of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm might be over 10 W. The design of your Raman laser cavity need to be optimized so that you can stay away from the injury from the M1 and diamond area.
The normal electricity of the NIR laser continue to has the probable to generally be enhanced to tens of watts including 70 W [26] if the double-move configuration can be utilized for that Yb:YAG SCF amplifier stage. That's why, If your conversion efficiency of 31% from NIR to DUV can be even now maintained at this increased ability problem, the normal output ability from the DUV laser at 258 nm may be over twenty W, which would be considered a remarkable electricity stage with the DUV laser and lead to the unanticipated DUV laser machining results. Furthermore, for top-power DUV laser, the UV damage on the nonlinear crystal, such as the windows for CLBO crystal as well as the mirrors, is another essential parameter for long-term and stable Procedure.
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On one other facet, the ability scaling from the NIR laser is another component to enhance the regular electrical power from the 193-nm DUV laser. Due to insufficient the high-electric power amplification Remedy of the NIR laser (by way of example at 1553 nm), nonlinear frequency processes for instance optical parameter oscillation (OPO) might be placed on build a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength and obtaining relative increased power [21]. Not too long ago, a diamond Raman laser confirmed its means in reaching a large ability as well as a substantial conversion effectiveness for the 1st Stokes of your one-μm laser [22,23], which means the likelihood being utilized while in the 193-nm DUV laser era on account of its substantial Raman obtain and large frequency change.
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The heartbeat period of the next Stokes light was shortened to five ns as shown in Determine 7a, a single-shot photo in the oscilloscope, which happens to be a typical phenomenon in Raman laser [forty four] whilst the pulse period from the pump laser was ten ns.
Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of your Nd:YAG essential laser wavelength. So that you can greatly enhance the hurt threshold, lower CLBO surface area roughness, by ultra-precision machining, is necessary. Since the CLBO crystal has straightforward hydroscopic reaction and micro scratches in machining, extremely-precise machining of the CLBO crystal is often a hard technical problem.
The beam profile revealed in Figure 7b demonstrated a fantastic beam quality as one of many merits of Raman laser, which would be useful to crank out a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The effective nonlinear optical coefficient of CLBO for frequency doubling at click here 1064nm is about 2 times as huge as that of KDP. CLBO crystals could be developed with the stoichiometric melt with lessen viscosity.
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