Indicators on CLBO Crystal You Should Know
Indicators on CLBO Crystal You Should Know
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All-good-state ultraviolet lasers have already been commonly used in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact volume, very long everyday living, superior performance, very good beam top quality, large tuning and slim spectral line, and so forth. Employing substantial electric power in close proximity to-infrared coherent gentle source as the elemental frequency resource based upon nonlinear tuning technological know-how, producing ultraviolet coherent radiation by multistage frequency conversion is regarded as a significant approach to develop the ultraviolet coherent mild resource.
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According to the evidence-of-basic principle experiment, the conversion effectiveness of 23% implied the potential of reaching high-ability at the next Stokes wavelength from the Raman laser. If the pump laser of 1078 nm may very well be acquired at the common electricity of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm could be more than ten W. The design of your Raman laser cavity should be optimized as a way to steer clear of the injury in the M1 and diamond floor.
For instance, the current concave OC could be replaced by a plane mirror which could mitigate the power density around the surface of M1 and also the diamond. Furthermore, utilizing substantial harm threshold coatings for M1 and diamond would also Enhance the output electrical power with none damages. Then, the NIR laser with the 2nd Stokes wavelength might be significant sufficient, as well as its very good beam high quality, to crank out the ultimate DUV laser at 193 nm that has a substantial regular ability.
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As a result of thermal lens effect while in the reliable-state lasers, If your heating management is inadequate, It's not quick to get the solid-condition laser which has a higher electricity and a substantial beam top quality concurrently. Not long ago, with the event of The skinny disk laser and solitary-crystal fiber (SCF) laser, a substantial-electric power laser at the fundamental wavelength (1 μm) had been understood with a good beam quality Despite having a TEM00 method beam [4,24], which would be superior candidates for the basic in the DUV laser generation. An additional candidate for the elemental could be the high-power fiber laser which could be obtained by coherent beam blend with M2 worth lower than one.
On another facet, the power scaling with the NIR laser is another part to boost the average ability on the 193-nm DUV laser. Because of the deficiency of the higher-ability amplification Remedy of your NIR laser (by way of example at 1553 nm), nonlinear frequency procedures including optical parameter oscillation (OPO) can be placed on develop a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with getting relative better electrical power [21]. A short while ago, a diamond Raman laser showed its skill in reaching a substantial power in addition to a high conversion efficiency in the 1st Stokes from the 1-μm laser [22,23], which implies the possibility to become applied while in the 193-nm DUV laser era on account of its substantial Raman achieve and huge frequency change.
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The beam profile shown in Figure 7b demonstrated a superb beam excellent as among the merits of Raman laser, which would be advantageous to deliver a 193-nm DUV laser with a top quality beam.
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