The best Side of CLBO Crystal
The best Side of CLBO Crystal
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Nonetheless, to be able to procedure the crystal is very Highly developed production strategies are needed. Considering that the dawn of this crystal, engaged on this problem, we are now the one business on the planet which might be processed With this crystal.
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We summarized The present progress standing of the significant-power DUV laser both of those at the wavelength of FHG of your 1-μm laser and at 193 nm. The modern advancement of your stable-state/fiber laser, plus the nonlinear optical crystals, prompts not merely the normal electrical power but in addition the beam top quality (coherence) on the DUV lasers to an unparalleled level.
For example, the current concave OC could get replaced by a aircraft mirror which could mitigate the facility density within the area of M1 and the diamond. Additionally, employing higher hurt threshold coatings for M1 and diamond would also improve the output energy with no damages. Then, the NIR laser for the 2nd Stokes wavelength could be higher more than enough, as well as its very good beam high quality, to crank out the final DUV laser at 193 nm which has a large average electric power.
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Each the 1040 nm and 1078 nm laser originate from just one dual-wavelength Yb-doped fiber laser. Each laser is amplified by phases of fiber amplifier and Yb-doped supplies amplifier, respectively.
On the other aspect, the power scaling of the NIR laser is yet another facet to increase the normal electrical power of your 193-nm DUV laser. A result of the lack of the large-electric power amplification Answer with the NIR laser (for instance at 1553 nm), nonlinear frequency procedures such as optical parameter oscillation (OPO) may be placed on create a wavelength here converter by shifting the wavelength from one μm to the specified wavelength in addition to acquiring relative bigger electrical power [21]. Not long ago, a diamond Raman laser confirmed its capability in accomplishing a high electrical power and also a high conversion efficiency with the 1st Stokes of your 1-μm laser [22,23], which implies the chance to become utilized from the 193-nm DUV laser era as a consequence of its superior Raman acquire and huge frequency shift.
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While in the scientific and industrial apps, the beam high-quality of the DUV laser can also be a crucial parameter. Specifically, the beam high quality of the DUV laser significantly impacts the laser machining final results. The beam top quality on the DUV laser is set by that of the basic laser along with the crystal to the frequency conversion. Just lately, a substantial-electricity DUV laser (>10 W) at 258 nm was documented using a beam top quality of M2 < one.five, which was produced by FHG of a Yb:YAG laser at 1030 nm using the CLBO crystal [thirteen]. This laser would bring on an even better laser machining end result when compared with the earlier DUV lasers with bigger M2.
The heartbeat period of the second Stokes gentle was shortened to five ns as shown in Figure 7a, only one-shot picture with the oscilloscope, that is a typical phenomenon in Raman laser [forty four] whilst the heartbeat period of your pump laser was 10 ns.
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The beam profile demonstrated in Figure 7b shown a very good beam good quality as one of the deserves of Raman laser, which would be useful to deliver a 193-nm DUV laser with a high quality beam.
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The development of the 193-nm laser was shown by phases of SFG. In order to scale the DUV laser ability properly, a brand new thought with the 193-nm DUV laser generation is introduced determined by the diamond Raman laser.