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| Coad | 667084 | Substrate | UVFS | |
| Type | Harmonic Beam Splitter | Clear Aperture | ≥20mm | |
| Dimension(mm) | 25.4 x 3.0 | Parallelism | <5 arcmin | |
| Diameter | 25.4mm +0/-0.1 mm | Protective Chamfer | 0.2-0.4mm x 45° | |
| Thickness | 3.0mm +0/-0.1 mm | Surface Quality S1 | 20/10 S/D over CA MIL-PRF-13830B | |
| HR Wavelength (nm) | 257 | Surface Quality S2 | 20/10 S/D over CA MIL-PRF-13830B | |
| HT Wavelength (nm) | 515 | Surface Flatness | <λ/10 @633 nm over any 8 mm dia within CA | |
| AOI(°) | 45 | Coating Type | IBS Coating | |
| Reflectivity | >99.5% | Coating Parameter S1 | HRs>99.5% @ 257.5 nm + HTp>98% @ 515 nm | |
| Transmittance | >98% | Coating Parameter S2 | ARp<0.1% @ 515 nm |
The harmonic beam splitter is a high-performance optical filter designed specifically for modern laser systems. It can efficiently inject pump light into the cavity or act as a frequency-doubling mirror to double the frequency of the beam inside the cavity. Its unique multi-layer dielectric coating structure provides extremely high reflectivity for specific wavelengths while maintaining good transmission performance for non-target wavelengths, ensuring minimal energy loss during the laser transmission process. The multi-layer dielectric coating also exhibits excellent density uniformity and adhesion, effectively suppressing spectral shifts caused by changes in environmental temperature and humidity.
This product achieves >99.5% reflectivity in commonly used laser wavelengths (e.g., 532 nm, 800 nm, 1064 nm) while maintaining >90% transmission in non-operating wavelengths, meeting the stringent requirements of high-power lasers, spectrometers, and high-resolution imaging systems. Furthermore, harmonic beam splitters excel in harmonic separation, pump light path optimization, and multi-wavelength combined experiments, providing reliable, stable, and easily integrable solutions for both research and industrial applications.
Precautions: For optimal performance, it is recommended to store and use the product in an environment with a temperature of 25°C and a relative humidity of 40%-60%. If the mirror surface becomes contaminated, gently wipe it with alcohol (99% or higher) and lint-free lens cleaning paper. Avoid using rough fabrics, water, or cleaning agents containing abrasive particles to prevent damaging the coating.
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