Sales Engineer: Grace Gao
Email: grace@rsnv.cn
WhatsApp: +86 199 2997 5286
Short Wave Pass Filter from RSNV is a precision dichroic optical component specifically engineered for 45° angle of incidence operation in Nd:YAG laser systems. It enables efficient separation of the 532nm second harmonic (green beam) from residual 1064nm fundamental (infrared pump beam). Manufactured with advanced dielectric thin-film coatings, this filter delivers a steep spectral edge with high contrast between the passband and rejection band. Available in K9 optical glass for cost-effective applications or fused silica for high-power and UV-extended requirements, the filter comes in standard diameters of Φ20 mm and Φ30 mm, with full customization supported for size, thickness, and cut-off wavelength. This makes it an ideal solution for laser harmonic generation, fluorescence microscopy, spectroscopy, and LiDAR systems.
1. High-Performance Anti-Reflection Coating at 532nm
The filter features an AR coating on the second surface with <0.2% reflection at 532nm (45° AOI). This minimizes back-reflections and ghost images that could interfere with the transmitted green beam, ensuring clean output for precision applications.
2.Steep Spectral Edge for Clean Separation
Shortwave Pass Filter Key Selling Points
1. Complete Wavelength Separation in a Single Element
The dual-function coating design integrates both a high-reflection coating (>99.8% @1064nm) on the front face and an anti-reflection coating (<0.2% @532nm) on the back face. This eliminates the need for multiple optical components in the beam path, simplifying system design, reducing alignment complexity, and lowering overall system cost.
2. Optimized for 45° Harmonic Separation in Nd:YAG Lasers
Specifically engineered for 45° angle of incidence operation, this shortpass filter enables efficient separation of the 532nm second harmonic (green) from the residual 1064nm fundamental (infrared pump beam). The transmitted green beam achieves >95% transmission, while the reflected IR beam is redirected at a clean 90° angle.
3. High-Performance Anti-Reflection Coating for Ghost-Free Output
The back face features an AR coating with <0.2% reflection at 532nm (45° AOI), effectively minimizing back-reflections and eliminating ghost images that could interfere with sensitive measurements or damage downstream optics. This ensures a clean, high-quality output beam for precision applications.
4. Steep Spectral Edge for High-Contrast Separation
Advanced dielectric thin-film coatings provide a sharp transition edge between the passband (532nm) and rejection band (1064nm). This steep spectral slope ensures minimal cross-talk between wavelengths, delivering clean spectral separation essential for demanding applications like fluorescence microscopy, Raman spectroscopy, and multi-wavelength laser systems.
5. Dual Material Options for Any Power Level
Choose between K9 optical glass for cost-effective, low-to-medium power applications (transmission range 350-2100nm, max 600°C) or fused silica for high-power CW and pulsed laser systems (transmission range 190-2500nm, max 1100°C, CTE 0.55 × 10⁻⁶/K). Fused silica's exceptional thermal stability and higher laser damage threshold (>20 J/cm² @1064nm) make it the preferred choice for demanding high-power environments.
6. Fully Customizable for Your Specific Requirements
Available in standard diameters of Φ20 mm and Φ30 mm, with full customization supported for size, thickness, cut-off wavelength, angle of incidence (0° to 45°), substrate material, and coating specifications. Whether you need a different passband/rejection band combination or a non-standard form factor, our engineering team can deliver a solution tailored to your optical system.
Sales Engineer: Grace Gao
Email: grace@rsnv.cn
WhatsApp: +86 199 2997 5286
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