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830 nm Ultra-Steep Long-Wave Pass Filter
This product is an ultra-steep long-wave pass filter specifically designed for 830 nm laser Raman spectroscopy systems. It effectively blocks the 830 nm laser line and short-wavelength background light while offering high transmission for long-wavelength Raman scattering signals. Manufactured with a fused silica substrate and high-performance multilayer dielectric coatings, it features deep blocking, high transmittance, narrow transition band, and steep edges. It is suitable for Raman spectrometers, biomedical detection, chemical analysis, and near-infrared spectral systems.
Product features:Optimized for 830 nm laser applications;Blocking depth > OD6 at 830 nm;Average transmission > 93% in the 835.4–1872.2 nm band;Average transmittance > 93%;Ultra‑steep edge design;Fused silica substrate
Part Number:MP-LPF-830
Application area:Raman spectrometers | Micro-Raman systemss | Biomedical Detection | Chemical substance detection | Research and laboratory equipment
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Laser Wavelength Transmission Band
830 nm Tavg > 93 % 835.4–1872.2 nm

Specification | Value |
Laser Wavelength | 830 nm |
Transmission Band | Tavg > 93 % 835.4–1872.2 nm |
Blocking Band | OD > 6 830 nm |
Blocking Band | ODavg > 6 664–830 nm |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 0.002 |
Edge Steepness | 24 cm-1 |
Edge Steepness | 1.7 |
Edge Wavelength | 832.5 nm |
Transition Width | 4.2 nm |
Transition Width | 60 cm-1 |
Angle of Incidence | 0 ± 2° |
Cone Half-angle | 5° |
Clear Aperture | 22 mm |
Transverse Dimensions, Diameter | 25 mm |
Filter Thickness, Mounted | 3.5 mm |
Filter Thickness Tolerance, Mounted | ± 0.1 mm |
Filter Thickness, Unmounted | 2.0 mm |
Filter Thickness Tolerance, Unmounted | ± 0.1 mm |
Surface Quality (Scratch-Dig) | 60-40 |
Filter Effective Index | 2.12 |
Optical Damage Rating | 0.5 J/cm² @ 266 nm (10 ns pulse width), 1 J/cm² @ 532 nm (10 ns pulse width) |
Orientation | Arrow on ring is preferred direction of propagation of light |
Substrate Type | Fused Silica |
Spectral Characteristic Curves
Transmittance-Wavelength Spectrum
Optical Density Spectrum
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