The 2-Minute Rule for CLBO Crystal
The 2-Minute Rule for CLBO Crystal
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All-sound-condition ultraviolet lasers have been extensively Employed in the fields of mechanical flaw detection, lithography, micromachining and medication for some great benefits of compact quantity, lengthy lifetime, higher performance, superior beam high-quality, wide tuning and narrow spectral line, etc. Making use of large power around-infrared coherent gentle supply as the fundamental frequency supply depending on nonlinear tuning technological know-how, building ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital solution to build the ultraviolet coherent light source.
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In accordance with the proof-of-principle experiment, the conversion efficiency of 23% implied the potential for accomplishing high-electrical power at the second Stokes wavelength in the Raman laser. If your pump laser of 1078 nm can be attained at the standard power of fifty W, the output electrical power of its 2nd Stokes wavelength at 1512 nm may very well be much more than 10 W. The design in the Raman laser cavity must be optimized so as to steer clear of the problems in the M1 and diamond surface.
The crucial element challenge of ultraviolet coherent light supply largely focuses on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the disorders for frequency transformation, so the growth, dimension, destruction resistance, conversion efficiency and allowable parameter range of nonlinear optical crystal are expected Increasingly more.
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On another facet, the power scaling with the NIR laser is another part to raise the typical ability with the 193-nm DUV laser. As a result of deficiency of the substantial-electrical power amplification Remedy with the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures including optical parameter oscillation (OPO) could be applied to make a wavelength converter by shifting the wavelength from one μm to the specified wavelength in addition to obtaining relative larger electricity [21]. Not long ago, a diamond Raman laser confirmed its skill in acquiring a superior ability in addition to a high conversion performance within the 1st Stokes with the one-μm laser [22,23], which suggests the possibility to generally be utilized inside the 193-nm DUV laser generation because of its high Raman attain and huge frequency shift.
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While in the scientific and industrial apps, the beam good quality on the DUV laser is likewise an essential parameter. Particularly, the beam excellent in the DUV laser dramatically influences the laser machining outcomes. The beam excellent in the DUV laser is decided by that of the fundamental laser plus the crystal for your frequency conversion. Not long ago, a high-electricity DUV laser (>ten W) at 258 nm was reported using a beam excellent of M2 < one.five, which was created by FHG of the Yb:YAG laser at 1030 nm utilizing the CLBO crystal [thirteen]. This laser would result in an even better laser machining final result in comparison with the past DUV lasers with much larger M2.
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Its UV absorption edge reaches 180 nm. The efficient nonlinear optical coefficient of CLBO for frequency doubling at 1064nm is about twice as significant as that of KDP. CLBO crystals is often grown in the stoichiometric soften with decreased viscosity.
The development with the 193-nm laser was demonstrated by phases of SFG. To be able to scale the DUV laser electricity successfully, a whole new concept on the 193-nm DUV laser technology is presented determined by the diamond Raman laser.