The Basic Principles Of CLBO Crystal
The Basic Principles Of CLBO Crystal
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All-good-point out ultraviolet lasers have been greatly Employed in the fields of mechanical flaw detection, lithography, micromachining and drugs for some great benefits of little volume, long daily life, substantial efficiency, great beam quality, wide tuning and slim spectral line, and so forth. Utilizing significant electricity near-infrared coherent mild supply as the fundamental frequency resource determined by nonlinear tuning technologies, generating ultraviolet coherent radiation by multistage frequency conversion is thought to be an essential method to develop the ultraviolet coherent mild source.
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According to the proof-of-basic principle experiment, the conversion performance of 23% implied the opportunity of obtaining significant-electricity at the next Stokes wavelength on the Raman laser. Should the pump laser of 1078 nm could be obtained at the average energy of 50 W, the output electric power of its 2nd Stokes wavelength at 1512 nm can be much more than 10 W. The look with the Raman laser cavity really should be optimized so as to stay away from the harm with the M1 and diamond floor.
The real key difficulty of ultraviolet coherent light-weight resource predominantly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is probably the ailments for frequency transformation, so The expansion, dimensions, hurt resistance, conversion effectiveness and allowable parameter variety of nonlinear optical crystal are required A growing number of.
However, the beam high-quality of this increased energy DUV laser would develop into even worse as a result of much more really serious thermal and nonlinear results. As a result, the frequency conversion procedures ought to be meticulously meant to mitigate the aforementioned consequences. Therefore, a large-electricity DUV laser for the FHG of one μm with a fantastic beam high quality might be acquired and will be advantageous for obtaining the shorter wavelength DUV lasers such as 193 nm by SFG.
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On the other facet, the facility scaling on the NIR laser is an additional facet to boost the average ability on the 193-nm DUV laser. As a result of lack of the significant-electrical power amplification Alternative with the NIR laser (for instance at 1553 nm), nonlinear frequency procedures including optical parameter oscillation (OPO) can be placed on build a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also getting relative larger electric power [21]. Lately, a diamond Raman laser showed its potential in acquiring a higher electricity in addition to a higher conversion efficiency with the 1st Stokes with the one-μm laser [22,23], which suggests the likelihood being utilized while in the 193-nm DUV laser era as a consequence of its significant Raman gain and large frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the simplest non-linear crystal which generates ultraviolet harmonics of the Nd:YAG essential laser wavelength. So as to increase the harm threshold, low CLBO floor roughness, by ultra-precision machining, is necessary. Because the CLBO crystal has quick hydroscopic reaction and micro scratches in machining, extremely-precise machining in the CLBO crystal can be a tough complex issue.
Tunable ultraviolet laser source according to strong-point out dye laser technology and CsLiB6O10 harmonic technology
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