The Basic Principles Of CLBO Crystal

All-reliable-state ultraviolet lasers have already been widely Utilized in the fields of mechanical flaw detection, lithography, micromachining and drugs for the advantages of small quantity, long existence, high effectiveness, good beam excellent, large tuning and slender spectral line, etc. Making use of higher electrical power in close proximity to-infrared coherent gentle resource as the fundamental frequency source according to nonlinear tuning know-how, creating ultraviolet coherent radiation by multistage frequency conversion is regarded as a vital way to produce the ultraviolet coherent light-weight source.

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We summarized The existing progress position on the large-electrical power DUV laser both for the wavelength of FHG in the one-μm laser and at 193 nm. The recent improvement of your reliable-condition/fiber laser, together with the nonlinear optical crystals, prompts not simply the normal ability and also the beam excellent (coherence) with the DUV lasers to an unparalleled amount.

The main element difficulty of ultraviolet coherent mild source mostly concentrates on the event of nonlinear optical frequency conversion crystal in ultraviolet band. The nonlinear optical crystal is amongst the situations for frequency transformation, so the growth, sizing, destruction resistance, conversion performance and allowable parameter array of nonlinear optical crystal are demanded A lot more.

Conversely, the beam high-quality of the higher electrical power DUV laser would come to be worse as a consequence of more significant thermal and nonlinear consequences. For this reason, the frequency conversion procedures should be very carefully meant to mitigate the aforementioned effects. Consequently, a substantial-ability DUV laser at the FHG of 1 μm with a fantastic beam high-quality may be attained and will be beneficial for obtaining the shorter wavelength DUV lasers which include 193 nm by SFG.

Due to the thermal lens outcome within the strong-point out lasers, When the heating administration is insufficient, It's not at all effortless to obtain the sound-condition laser having a superior power and also a superior beam high quality at the same time. Just lately, with the development of the thin disk laser and one-crystal fiber (SCF) laser, a superior-electricity laser at the fundamental wavelength (1 μm) had been understood with a very good beam quality Despite having a TEM00 method beam [four,24], which might be excellent candidates for the elemental of your DUV laser technology. A different applicant for the basic may be the higher-power fiber laser which can be reached by coherent beam blend with M2 worth lower than one.

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From the scientific and industrial applications, the beam excellent of your DUV laser can be an essential parameter. Significantly, the beam excellent on the DUV laser significantly influences the laser machining results. The beam top quality with the DUV laser is determined by that of the fundamental laser along with the crystal for that frequency conversion. Recently, a higher-energy DUV laser (>10 W) at 258 nm was reported having a beam high quality of M2 < 1.five, which was generated by FHG of a Yb:YAG laser at 1030 nm utilizing the CLBO crystal [13]. This laser would bring about an improved laser machining outcome when compared with the preceding DUV lasers with greater M2.

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