A Simple Key For CLBO Crystal Unveiled
A Simple Key For CLBO Crystal Unveiled
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The real key issue of ultraviolet coherent gentle supply largely concentrates on the development of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is one of the situations for frequency transformation, so the growth, dimensions, problems resistance, conversion effectiveness and allowable parameter choice of nonlinear optical crystal are required An increasing number of.
However, the beam excellent of this larger ability DUV laser would grow to be worse as a consequence of a lot more really serious thermal and nonlinear results. For this reason, the frequency conversion processes should be meticulously meant to mitigate the aforementioned effects. As a result, a significant-power DUV laser on the FHG of 1 μm with a superb beam quality may very well be received and can be useful for acquiring the shorter wavelength DUV lasers including 193 nm by SFG.
As a result of thermal lens result in the sound-condition lasers, When the heating administration is insufficient, It is far from effortless to acquire the reliable-point out laser using a superior electricity plus a high beam good quality concurrently. A short while ago, with the event of the thin disk laser and single-crystal fiber (SCF) laser, a high-electricity laser at the elemental wavelength (1 μm) were understood with a good beam excellent In spite of a TEM00 mode beam [four,24], which would be superior click here candidates for the basic of the DUV laser technology. One more candidate for the fundamental may be the higher-power fiber laser which can be reached by coherent beam combination with M2 price under one.
On the opposite aspect, the power scaling of the NIR laser is an additional element to increase the regular electrical power of your 193-nm DUV laser. A result of the insufficient the high-electricity amplification Alternative of the NIR laser (by way of example at 1553 nm), nonlinear frequency procedures which include optical parameter oscillation (OPO) might be applied to develop a wavelength converter by shifting the wavelength from 1 μm to the specified wavelength as well as getting relative higher energy [21]. Not too long ago, a diamond Raman laser showed its capability in attaining a high electricity along with a higher conversion efficiency in the 1st Stokes from the one-μm laser [22,23], which means the likelihood for being applied in the 193-nm DUV laser technology as a consequence of its substantial Raman obtain and large frequency change.
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Cesium Lithium Borate (CsLiB6O10 or CLBO) is the best non-linear crystal which generates ultraviolet harmonics with the Nd:YAG essential laser wavelength. In order to enrich the damage threshold, small CLBO floor roughness, by extremely-precision machining, is required. As the CLBO crystal has straightforward hydroscopic reaction and micro scratches in machining, extremely-precise machining of the CLBO crystal is often a challenging technological difficulty.
The beam profile revealed in Determine 7b shown a good beam good quality as one of several deserves of Raman laser, which might be beneficial to produce a 193-nm DUV laser with a high 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 might be grown with the stoichiometric melt with lower viscosity.
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