The smart Trick of CLBO Crystal That No One is Discussing
The smart Trick of CLBO Crystal That No One is Discussing
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With this paper, The brand new lapping slurry and polishing slurry are launched. As well as deliquescence degree of CLBO is fallen to most affordable. A completely new Operating technologies is additionally adopted. Immediately after tough sprucing, the focus of extremely-precision sprucing slurry is increased correctly. So does the ultra-precision polishing speed, and also the wiping speed is quicker compared to the deliquescence velocity. The CLBO crystal area roughness can reach 1nm and retain the floor top quality very well. Access as a result of your establishment
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We summarized The present development standing in the high-ability DUV laser equally in the wavelength of FHG of your 1-μm laser and at 193 nm. The new development of the good-state/fiber laser, plus the nonlinear optical crystals, prompts not just the normal ability but also the beam excellent (coherence) from the DUV lasers to an unparalleled stage.
The normal electrical power of your NIR laser nevertheless has the opportunity being enhanced to tens of watts such as 70 W [26] In case the double-go configuration might be utilized to the Yb:YAG SCF amplifier phase. As a result, When the conversion effectiveness of 31% from NIR to DUV can be still preserved at this better ability condition, the average output energy from the DUV laser at 258 nm could possibly be over 20 W, which would become a amazing electric power stage to the DUV laser and bring about the unanticipated DUV laser machining outcomes. Moreover, for top-electrical power DUV laser, the UV harm of your nonlinear crystal, such as the Home windows for CLBO crystal as well as the mirrors, is an additional vital parameter for lasting and stable Procedure.
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Due to the thermal lens influence from the strong-state lasers, Should the heating management is inadequate, it is not straightforward to acquire the strong-point out laser using a high electricity in addition to a high beam top quality concurrently. A short while ago, with the event of The skinny disk laser and one-crystal fiber (SCF) laser, a significant-ability laser at the elemental wavelength (one μm) had been realized with a great beam high quality even with a TEM00 mode beam [four,24], which might be very good candidates for the basic in the DUV laser generation. Yet another candidate for the fundamental is definitely the significant-power fiber laser which might be achieved by coherent beam blend with M2 value fewer than 1.
On the other aspect, the facility scaling on the NIR laser is another factor to increase the normal electrical power of the 193-nm DUV laser. Mainly because of the insufficient the superior-electrical power amplification Option of the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures which include optical parameter oscillation (OPO) might be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength along with acquiring relative bigger energy [21]. Not too long ago, a diamond Raman laser showed its potential in acquiring a higher electricity in addition to a high conversion efficiency in the 1st Stokes in the 1-μm laser [22,23], which suggests the likelihood to get used in the 193-nm DUV laser technology because of its high Raman gain and enormous frequency change.
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In the scientific and industrial purposes, the beam high-quality of the DUV laser can be a crucial parameter. Specifically, the beam top quality with the DUV laser radically influences the laser machining benefits. The beam top quality of the DUV laser is set by that of the fundamental laser plus the crystal for your frequency conversion. Recently, a significant-electrical power DUV laser (>ten W) at 258 nm was noted with a beam high-quality of M2 < 1.five, which was created by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would lead to a much better laser machining final result in comparison with the earlier DUV lasers with much larger M2.
The heart beat length of the 2nd Stokes light-weight was shortened to five ns as demonstrated in Figure 7a, just one-shot picture within the oscilloscope, which happens to be a common phenomenon in Raman laser [forty four] although the heart beat period from the pump laser was 10 ns.
Also, combining the sound-condition laser with other nonlinear system like stimulated Raman scattering, NIR lasers might be attained at new wavelengths with substantial electric power and high beam high quality, which was tested from the proof-of-principle experiment. This Raman laser scheme provides a brand new path to the superior-electric power DUV laser, Specially with the wavelength of 193 nm.
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