CLBO Crystal Secrets
CLBO Crystal Secrets
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In accordance with the evidence-of-theory experiment, the conversion effectiveness of 23% implied the potential of attaining significant-electrical power at the next Stokes wavelength with the Raman laser. In the event the pump laser of 1078 nm may very well be acquired at the common ability of 50 W, the output electricity of its 2nd Stokes wavelength at 1512 nm may very well be greater than 10 W. The design with the Raman laser cavity should be optimized in an effort to steer clear of the problems from the M1 and diamond area.
The normal energy of the NIR laser nonetheless has the probable to be enhanced to tens of watts which include 70 W [26] Should the double-move configuration may be used for that Yb:YAG SCF amplifier stage. That's why, if the conversion performance of 31% from NIR to DUV could be even now managed at this higher electric power problem, the standard output electric power of the DUV laser at 258 nm might be much more than 20 W, which might be a exceptional electrical power amount for your DUV laser and produce the unanticipated DUV laser machining success. In addition, for high-electric power DUV laser, the UV problems in the nonlinear crystal, such as the windows for CLBO crystal as well as the mirrors, is yet another important parameter for long run and stable Procedure.
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As a result of thermal lens outcome within the reliable-point out lasers, If your heating administration is inadequate, it is not easy to acquire the stable-condition laser that has a large ability as well as a superior beam top quality at the same time. Just lately, with the development of the thin disk laser and single-crystal fiber (SCF) laser, a significant-energy laser at the basic wavelength (one μm) were realized with a superb beam excellent In spite of a TEM00 mode beam [4,24], which might be great candidates for the fundamental with the DUV laser era. An additional candidate for the get more info elemental could be the higher-electric power fiber laser which could possibly be obtained by coherent beam mixture with M2 price lower than 1.
On the opposite side, the power scaling of your NIR laser is an additional element to increase the common electricity of the 193-nm DUV laser. Due to the not enough the large-electric power amplification Resolution of the NIR laser (as an example at 1553 nm), nonlinear frequency processes like optical parameter oscillation (OPO) could possibly be applied to build a wavelength converter by shifting the wavelength from one μm to the desired wavelength together with acquiring relative greater power [21]. Not long ago, a diamond Raman laser showed its ability in accomplishing a high energy along with a high conversion effectiveness at the 1st Stokes with the 1-μm laser [22,23], which means the possibility to become utilized from the 193-nm DUV laser generation due to its substantial Raman attain and enormous frequency shift.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics from the Nd:YAG basic laser wavelength. So as to increase the injury threshold, very low CLBO floor roughness, by extremely-precision machining, is necessary. Because the CLBO crystal has easy hydroscopic response and micro scratches in machining, extremely-exact machining with the CLBO crystal is really a challenging complex dilemma.
Tunable ultraviolet laser source dependant on reliable-condition dye laser engineering and CsLiB6O10 harmonic generation
Its UV absorption edge reaches a hundred and eighty nm. The successful nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as huge as that of KDP. CLBO crystals is often grown through the stoichiometric melt with decreased viscosity.
The development of the 193-nm laser was shown by levels of SFG. In order to scale the DUV laser ability effectively, a brand new principle of the 193-nm DUV laser technology is offered based on the diamond Raman laser.