The best Side of CLBO Crystal
The best Side of CLBO Crystal
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We summarized the current growth status of your significant-electrical power DUV laser both for the wavelength of FHG from the one-μm laser and at 193 nm. The current progress on the sound-condition/fiber laser, and also the nonlinear optical crystals, prompts not simply the average electric power but also the beam quality (coherence) on the DUV lasers to an unprecedented degree.
For example, the current concave OC could get replaced by a aircraft mirror which could mitigate the power density on the floor of M1 along with the diamond. In addition, using significant injury threshold coatings for M1 and diamond would also Increase the output electric power without any damages. Then, the NIR laser within the 2nd Stokes wavelength may be high more than enough, along with its superior beam top quality, to deliver the final DUV laser at 193 nm using a significant ordinary electrical power.
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Because of the thermal lens outcome within the sound-condition lasers, if the heating administration is inadequate, It isn't effortless to acquire the strong-condition laser with a high energy in addition to a substantial beam excellent at the same time. Not long ago, with the event of the thin disk laser and single-crystal fiber (SCF) laser, a substantial-power laser at the fundamental wavelength (1 μm) had been recognized with a very good beam high quality Despite a TEM00 method beam [four,24], which might be good candidates for the basic on the DUV laser era. A further prospect for the elemental is definitely the high-power fiber laser which might be accomplished by coherent beam combination with M2 benefit fewer than 1.
On the other facet, the facility scaling on the NIR laser is another aspect to enhance the normal electricity from the 193-nm DUV laser. Due to the deficiency of the large-power amplification Resolution in the NIR laser (by way of example at 1553 nm), nonlinear frequency processes which include optical parameter oscillation (OPO) could possibly be placed on create a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength as well as acquiring relative better power [21]. Not too long ago, a diamond Raman laser confirmed its means in reaching a higher electric power in addition to a higher conversion efficiency on the 1st Stokes on the 1-μm laser [22,23], which implies the possibility to generally be used during the 193-nm DUV laser technology as a consequence of its significant Raman get and huge frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the most effective non-linear crystal which generates ultraviolet harmonics from the Nd:YAG fundamental laser wavelength. In order to enrich the damage threshold, small CLBO floor roughness, by ultra-precision machining, is needed. As the CLBO crystal has effortless hydroscopic reaction and micro scratches in machining, extremely-exact machining in the CLBO crystal is actually a difficult complex difficulty.
The beam profile demonstrated in Figure 7b shown a very good beam high quality as one of the merits of Raman laser, which would be valuable to deliver a 193-nm DUV laser with a top quality beam.
Its UV absorption edge reaches 180 nm. The helpful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about two times as big as that of KDP. CLBO crystals can be developed in the stoichiometric soften with decrease viscosity.
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