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Home > Frequently Asked Questions > Measurements > Raman > What is the best sampling optic for Raman?

What is the best sampling optic for Raman?

The beauty of Raman spectroscopy is that it can be performed on a wide range of samples, from liquids and gels to powders, capsules, and large objects. A fiber optic probe assembly is the sampling optic most often used in a modular Raman spectroscopy system. It consists of a fiber bundle to route excitation light from the laser to the sample and collect Raman scattered light. Light at the laser wavelength (Rayleigh scattering) is rejected on the path to the spectrometer using a dichroic filter to avoid saturating the detector.

We offer a range of fiber optic probes for Raman spectroscopy with 532 and 785 nm excitation. The RIP-series probes include models for laboratory, industrial and environmental applications with SMA or FC connectors.  The process probes are rated for use at up to 200°C and 1500 psi, while the immersion probes go up to 500°C and 3000 psi. Options include stainless steel and Hastelloy C housings and sapphire windows.

These probes mate well with the OOA-RAMAN-SH sample holder, which is compatible with a variety of cuvette sizes and vials. It allows the user to adjust the distance between the probe and the sample simply and accurately to optimize the Raman signal while blocking ambient light with a cap. The OOA-HOLDER-RFA has many of the same features, but is designed as a multipurpose sampling fixture for Raman, fluorescence, absorbance and reflection measurements, with accessories for each technique.

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Raman Sample Holders

Raman Sample Holders

Sampling of SERS, Liquids, Powders and More