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| Coad | 669113 | Substrate | UVFS | |
| Type | Nd:YAG Harmonic Beamsplitter | Clear Aperture | ＜90%CA | |
| Dimension(mm) | 25.4 x 5.0 | Parallelism | 30arcmin ± 10arcmin | |
| Diameter | 25.4mm +0/-0.1 mm | Protective Chamfer | - | |
| Thickness | 5.0mm +0/-0.1 mm | Surface Quality S1 | 10-5 | |
| HR Wavelength (nm) | 1064 | Surface Quality S2 | - | |
| HT Wavelength (nm) | 532 | Surface Flatness | λ/10 | |
| AOI(°) | 45 | Coating Type | Filter Coating | |
| Reflectivity | >99% | Coating Parameter S1 | R＞99%@1064nm | |
| Transmittance | >95% | Coating Parameter S2 | V Coating：Rabs＜0.5%@532nm |
In Nd:YAG laser applications, it is often necessary to separate the fundamental frequency from its harmonic components. LBTEK Nd:YAG Harmonic Beamsplitters are designed based on the wavelength-selective transmission and reflection properties of specialized optical coatings. The incident surface is coated with a beamsplitter coating that effectively separates the Nd:YAG laser harmonics, while the exit surface is coated with a V-type anti-reflection coating to minimize reflections at the air-glass interface. Compared to the typical ~4% surface reflectance of uncoated optics, the AR coating reduces the average reflectance of each surface to below 0.5% within the specified wavelength range. In addition, a 30-arcmin wedge structure is incorporated to effectively reduce interference effects between reflections from the incident and exit surfaces. LBTEK offers Nd:YAG Harmonic Beamsplitters in four wavelength configurations, available in two sizes: Ø12.7 mm and Ø25.4 mm.
LBTEK Nd:YAG Harmonic Beamsplitters are designed for separating Nd:YAG laser harmonics. They not only minimize interference from reflected beams but can also be used to deflect specific wavelengths. Four wavelength configurations are available.
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