Raman spectroscopy directly probes the vibrational and rotational states of a molecule via scattering from a molecule of merely one photon in a million. Unlike infrared spectroscopy, no sample preparation is required, nor is there interference due to water content in the sample. Samples can be analyzed against a library in the field using non-destructive,…
Raman spectroscopy measurements generally face two limitations: (1) Raman scattering cross sections are small, requiring intense lasers and sensitive detection systems to achieve adequate signal (2) the signal-to-noise ratio is further limited by fundamental, intrinsic noise sources like sample autofluorescence. Raman measurements are most commonly performed with green, red, or near-infrared (IR) lasers, largely because…
Laser and LED-based optical systems depend on optical filters and mirrors to route, combine, separate, and purify light as a function of wavelength and/or polarization, often at high intensity. Filter efficiency plays a large role in overall system performance, and can mean the difference between an experiment or product design that is successful and one…
