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1064 nm Ultra-Steep Long-Wave Pass Filter
The MP-LPF-1064 is an ultra-steep edge longpass filter specifically designed for 1064 nm Raman spectroscopy systems. Manufactured with high-performance hard dielectric coatings, this filter effectively blocks the 1064 nm laser while providing high transmission in the Raman Stokes signal region. It is particularly suitable for near-infrared Raman spectroscopic detection. Featuring an extremely narrow transition band and excellent rejection performance, the filter maximises the retention of Raman signals close to the excitation wavelength, thereby improving system detection sensitivity and signal-to-noise ratio. It is a critical optical component for both research and industrial-grade Raman spectrometers.
Product features:Optimised for 1064 nm laser;Laser rejection depth OD > 6;Ultra-steep cut-off edge design;Average transmittance > 93%;High-stability hard dielectric coating;Fused silica substrate
Part Number:MP-LPF-1064
Application area:Raman spectrometers | Confocal Raman microscopes | Biomedical Detection | Chemical substance detection | Research and laboratory equipment
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Laser Wavelength Transmission Band
1064nm Tavg > 93% 1070.9–2000 nm

Specification | Value |
Laser Wavelength | 1064nm |
Transmission Band | Tavg > 93 % 1070.9–2000 nm |
Blocking Band | OD > 6 1064 nm |
Blocking Band | ODavg > 6 852–1064 nm |
Edge Steepness | Ultrasteep (for Raman) |
Edge Steepness | 0.002 |
Edge Steepness | 18.8cm-1 |
Edge Steepness | 2.1 |
Edge Wavelength | 1067.1 nm |
Transition Width | 5.3 nm |
Transition Width | 47 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 | 2.01 |
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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