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  • 561.4 nm Ultrasteep Raman Long-Pass Filter

    The MP-LPF-561 is an ultra-steep longpass edge filter specifically designed for 561.4 nm laser Raman spectroscopy systems. Manufactured with a high-quality fused silica substrate and precision dielectric thin‑film coating technology, it provides efficient blocking of the 561.4 nm excitation laser while maintaining high transmission in the Raman scattering signal band. Featuring laser suppression of OD > 6, an ultra-narrow transition band, and an ultra-steep cut-off edge, this filter effectively reduces Rayleigh scattering background and improves Raman signal detection sensitivity. It is suitable for high-end Raman spectrometers, laser analysis systems, and research-grade optical inspection equipment.

    Product features:Specifically designed for 561.4 nm Raman laser systems;High transmission: average transmittance > 93%;Laser blocking depth: OD6;Ultra‑steep cut‑off edge, suitable for high‑resolution Raman spectroscopy;Narrow transition band design, effectively improving weak Raman signal collection efficiency;Fused silica substrate with excellent thermal and environmental stability

    Part Number:MP-LPF-561

    Application area:Raman spectrometers | Laser Raman Imaging Systems | Biomedical Detection | Laser Spectroscopy Analysis | Scientific Research Equipment

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    Main parameters
  • Core parameters
  • Laser Wavelength Transmission Band

    561.4 nm Tavg > 93 % 565–1266.3 nm

  • Dimension Drawing
  • General Parameters

    Specification

    Value

    Laser Wavelength

    561.4 nm

    Transmission Band

    Tavg > 93 %  565–1266.3 nm

    Blocking Band

    OD > 6  561.4 nm

    Blocking Band

    ODavg > 6  450 – 561.4 nm (typical)

    Edge Steepness

    0.002

    Edge Steepness

    35.6 cm-1

    Edge Steepness

    Ultrasteep (for Raman)

    Edge Steepness

    1.1

    Edge Wavelength

    563.1 nm

    Transition Width

    2.8 nm

    Transition Width

    89 cm-1

    Angle of Incidence

    0 ± 2°

    Cone Half-angle

    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

    2.02

    Optical Damage Rating

    0.5 J/cm2 @ 266 nm (10 ns pulse width),1 J/ @ 53 cm2 2 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

    图片2.png 

     

     

    Optical Density Spectrum

     图片3.png


    Optional Configurations

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    Downloads

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  • Product title: 561.4 nm Ultrasteep Raman Long-Pass Filter
  • Product link: https://www.idealphotonics.com/product/detail/1659.html
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