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Raman spectroscopy filters

Raman Spectroscopy Filter Sets for 532 nm and 785 nm

Ion-beam-sputtered laser clean-up, ultra-steep long-pass edge and laser dichroic filters for 532 nm and 785 nm Raman: high optical density at the laser line, high transmission of the Raman-shifted light, and edges steep enough to reach low wavenumbers.

532 / 785 nm

Laser lines

3

Filter types per line

3

Standard sizes

Raman Spectroscopy Filter Sets for 532 nm and 785 nm
Best for: Building or upgrading a 532 nm or 785 nm Raman probe or bench with the Sunshine, Metal or a Raman-range Aurora.

Features

  • High optical density at the laser line
  • High transmittance of the Raman signal
  • Ultra-steep edges for low-wavenumber measurement
  • High laser-damage threshold and long lifetime
  • Ion-beam sputtering on Veeco coating equipment

Applications

  • Raman probes
  • Raman benches
  • Laser line clean-up

Filter models

Ø 25.4 × 2 mm round, 25.4 × 25.4 × 2 mm and 12.7 × 12.7 × 2 mm square, as listed per model.

WavelengthModelTypeSizes (mm)
532 nm532-AAB-54AB-3Laser clean-up filterØ 25.4 × 2 · 25.4 × 25.4 × 2 · 12.7 × 12.7 × 2
532 nm532-LAB-90CB-3Long-pass edge filterØ 25.4 × 2 · 25.4 × 25.4 × 2 · 12.7 × 12.7 × 2
532 nm532-LDAB-50AB-SLaser dichroic filter25.4 × 25.4 × 2 · 12.7 × 12.7 × 2
785 nm785-AAB-54AB-3Laser clean-up filterØ 25.4 × 2 · 25.4 × 25.4 × 2 · 12.7 × 12.7 × 2
785 nm785-LAB-90AB-4Long-pass edge filterØ 25.4 × 2 · 25.4 × 25.4 × 2 · 12.7 × 12.7 × 2
785 nm785-LDAB-50AB-SLaser dichroic filterØ 25.4 × 2 · 25.4 × 25.4 × 2 · 12.7 × 12.7 × 2

Technical Specifications

Raman spectroscopy filters Specifications

Filter set

Laser clean-up filterNarrow band-pass at the laser line, removes plasma lines and ASE before the sample
Long-pass edge filterBlocks the laser line, passes the Stokes-shifted Raman signal
Laser dichroic filterReflects the laser into the common path and transmits the Raman return
Coating processIon-beam sputtering

We confirm sizes, variants and compatibility with your spectrometer before quotation.

Figures

Drawings, Photos and Measured Data

Schematic of a Raman probe showing clean-up, dichroic and long-pass filters in the laser and collection paths
Where each filter sits in a Raman probe: band-pass in the excitation path, dichroic in the common path, long-pass before the collection fibre
532 nm laser clean-up filter transmission curve
532 nm laser clean-up filter
532 nm ultra-steep long-pass edge filter transmission curve
532 nm ultra-steep long-pass edge filter
532 nm laser dichroic filter transmission curve
532 nm laser dichroic filter
785 nm laser clean-up filter transmission curve
785 nm laser clean-up filter
785 nm ultra-steep long-pass edge filter transmission curve
785 nm ultra-steep long-pass edge filter
785 nm laser dichroic filter transmission curve
785 nm laser dichroic filter

Pairs With

Spectrometers and Accessories

HLS-1000 Halogen-Tungsten Light Source

Light source

HLS-1000

Absorbance, transmittance and reflectivity measurements from the visible into the near infrared.

TG-Series External Trigger Boxes EX-TA and EX-TB

Synchronisation

EX-TA / EX-TB trigger boxes

Pulsed-laser experiments — LIBS, time-gated fluorescence — where the spectrometer has to fire in step with the source.

SMA905 Optical Fibres for Spectrometers

Fibres

Optical fibres

Connecting spectrometers, light sources, cuvette holders and probes.

All fibre-optic spectrometers, probes and accessories

Configure the Raman spectroscopy filters for your measurement

Tell us the wavelength range, the resolution you need and what you are measuring; we will propose the grating, slit and accessories to match.