What Does CLBO Crystal Mean?
What Does CLBO Crystal Mean?
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All-solid-state ultraviolet lasers happen to be greatly Utilized in the fields of mechanical flaw detection, lithography, micromachining and medicine for the advantages of small quantity, extensive everyday living, superior effectiveness, excellent beam good quality, broad tuning and slender spectral line, etcetera. Making use of higher power near-infrared coherent gentle source as the basic frequency resource according to nonlinear tuning technology, making ultraviolet coherent radiation by multistage frequency conversion is thought to be a very important approach to establish the ultraviolet coherent mild supply.
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We summarized The present advancement position on the higher-power DUV laser both equally in the wavelength of FHG of your 1-μm laser and at 193 nm. The the latest improvement from the stable-state/fiber laser, together with the nonlinear optical crystals, prompts not just the normal power but in addition the beam high-quality (coherence) in the DUV lasers to an unparalleled stage.
全固态紫外激光器以其体积小、寿命长、效率高、光束质量好、调谐范围宽、谱线窄等优点，广泛应用于机械探伤、光刻、微加工和医学等领域，等，利用大功率近红外相干光源作为基于非线性调谐技术的基频源，通过多级变频产生紫外相干辐射被认为是发展紫外相干光源的重要途径。紫外相干光源的关键问题是研制紫外波段的非线性光学变频晶体。非线性光学晶体是实现频率变换的条件之一，因此对非线性光学晶体的生长、尺寸、损伤电阻、转换效率和允许的参数范围提出了越来越高的要求。
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LBO is usually a superb nonlinear crystal which is usually placed on the SHG from your NIR to your green. The DUV laser is normally recognized by two phases of SFG from the LBO crystals considering the fact that there's no section-matching angle for LBO to convert the green laser at 515 nm or 532 nm for the DUV specifically by SHG [16]. Just lately, the NSBBF crystal has also demonstrated its probable to obtain a superior conversion performance from 532 nm to 266 nm. The wander-off angle and deff of your NSBBF are Practically just like All those of CLBO [17].
On one other aspect, the ability scaling in the NIR laser is another element to increase the average ability on the 193-nm DUV laser. Because of the not enough the substantial-energy amplification solution with the NIR laser (as an example at 1553 nm), nonlinear frequency procedures like optical parameter oscillation (OPO) can be applied to make a wavelength converter by shifting the wavelength from one μm to the desired wavelength and also getting relative higher electrical power [21]. Just lately, a diamond Raman laser confirmed its capacity in attaining a high electricity in addition to a higher conversion effectiveness for the 1st Stokes of your one-μm laser [22,23], which implies the possibility to become applied within the 193-nm DUV laser era as a consequence of its substantial Raman get and huge frequency shift.
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The pulse length of the 2nd Stokes light-weight was shortened to 5 ns as revealed in Determine 7a, one-shot image from your oscilloscope, which happens to be a standard phenomenon in Raman laser [44] while the heart beat length in the pump laser was 10 ns.
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