All-reliable-condition ultraviolet lasers have been widely used in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of compact volume, long existence, large efficiency, great beam good quality, broad tuning and narrow spectral line, etcetera. Utilizing high ability in close proximity to-infrared coherent mild resource as the basic frequency source dependant on nonlinear tuning technological know-how, generating ultraviolet coherent radiation by multistage frequency conversion is considered an important approach to create the ultraviolet coherent light supply.
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In accordance with the proof-of-principle experiment, the conversion effectiveness of 23% implied the opportunity of reaching substantial-ability at the 2nd Stokes wavelength of the Raman laser. If your pump laser of 1078 nm can be attained at the standard power of 50 W, the output energy of its 2nd Stokes wavelength at 1512 nm could possibly be a lot more than 10 W. The design of your Raman laser cavity needs to be optimized as a way to avoid the damage in the M1 and diamond surface.
The average electrical power from the NIR laser continue to has the opportunity for being improved to tens of watts like 70 W [26] Should the double-go configuration may be utilized for that Yb:YAG SCF amplifier phase. Therefore, If your conversion effectiveness of 31% from NIR to DUV may very well be even now maintained at this greater electric power ailment, the typical output electrical power on the DUV laser at 258 nm may be in excess of 20 W, which would be a remarkable ability stage for your DUV laser and bring about the unanticipated DUV laser machining final results. In addition, for top-electric power DUV laser, the UV hurt from the nonlinear crystal, such as the windows for CLBO crystal and the mirrors, is yet another critical parameter for long-term and steady operation.
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LBO can be an excellent nonlinear crystal which is always applied to the SHG within the NIR on the green. The DUV CLBO Crystal laser is usually understood by two stages of SFG inside the LBO crystals due to the fact there isn't any phase-matching angle for LBO to convert the green laser at 515 nm or 532 nm to the DUV straight by SHG [16]. Not long ago, the NSBBF crystal has also revealed its opportunity to acquire a superior conversion efficiency from 532 nm to 266 nm. The wander-off angle and deff with the NSBBF are Just about much like These of CLBO [seventeen].
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics on the Nd:YAG elementary laser wavelength. In an effort to increase the harm threshold, reduced CLBO area roughness, by extremely-precision machining, is needed. As the CLBO crystal has simple hydroscopic response and micro scratches in machining, ultra-specific machining with the CLBO crystal is actually a complicated technical dilemma.
Tunable ultraviolet laser supply based upon stable-point out dye laser technological know-how and CsLiB6O10 harmonic technology
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