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We summarized the current enhancement position on the substantial-electrical power DUV laser each at the wavelength of FHG of your one-μm laser and at 193 nm. The current progress from the good-state/fiber laser, together with the nonlinear optical crystals, prompts not just the normal power but in addition the beam high-quality (coherence) from the DUV lasers to an unparalleled stage.
By way of example, The present concave OC could get replaced by a airplane mirror which could mitigate the ability density around the area of M1 as well as diamond. Also, utilizing higher problems threshold coatings for M1 and diamond would also improve the output electricity without any damages. Then, the NIR laser for the 2nd Stokes wavelength could be substantial more than enough, along with its good beam excellent, to deliver the final DUV laser at 193 nm using a substantial regular electricity.
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Due to the thermal lens influence while in the sound-condition lasers, if the heating management is inadequate, It is far from straightforward to obtain the good-condition laser having a superior electric power as well as a high beam excellent simultaneously. Not long ago, with the development of The skinny disk laser and one-crystal fiber (SCF) laser, a higher-electricity laser at the elemental wavelength (1 μm) had been realized with a superb beam high-quality even with a TEM00 mode beam [4,24], which would be fantastic candidates for the basic of the DUV laser generation. A further candidate for the fundamental would be the significant-power fiber laser which might be attained by coherent beam mixture with M2 worth under one.
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While in the scientific and industrial apps, the beam excellent with the DUV laser is usually a very important parameter. Particularly, the beam quality of your DUV laser radically has an effect on the laser machining benefits. The beam good quality of the DUV laser is determined by that of the elemental laser plus the crystal for your frequency conversion. Recently, a significant-electrical power DUV laser (>ten W) at 258 nm was noted that has a beam high quality of M2 < one.five, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would produce a much better laser machining consequence compared to the previous DUV lasers with more substantial M2.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics in the Nd:YAG basic laser wavelength. As a way to boost the harm threshold, minimal CLBO surface area roughness, by ultra-precision machining, is necessary. Because the CLBO crystal has easy hydroscopic response and micro scratches in machining, ultra-precise machining of the CLBO crystal is usually a tricky complex issue.
Tunable ultraviolet laser supply depending on strong-state dye laser technology and CsLiB6O10 harmonic generation
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