Raman Tools
Laser Selection: 532 / 785 / 1064 nm
The greatest enemy of Raman measurement is fluorescence — it can completely overwhelm a weak signal. Choosing the laser wavelength is a compromise between sensitivity and fluorescent background. Answer a few questions about your sample, and we will suggest which laser to start with.
Your sample
Why this is a compromise
Shorter wavelength (532 nm) provides the strongest Raman signal (intensity increases ~1/λ⁴) and the best spatial resolution — but it most easily excites fluorescence, so for organics, dyes, and resins, it often yields only background.
785 nm is the workhorse of industry: reasonable signal with significantly less fluorescence. The default choice for most chemical processes.
1064 nm almost eliminates fluorescence (excellent for dark, colored, biological, and strongly fluorescent samples), but has the weakest signal and a limited range of high wavenumbers on the detector — see spectral range calculator.
Have a sample you don’t want to guess about?
We conduct feasibility studies even on the most challenging samples — on your material, at your site. Leave your contact, and we will review your case and tell you directly whether Spectrally can measure it.
