Thorlabs offers complete optical spectrum analyzers for FTIR measurements over the near-UV to mid-IR wavelength ranges. We provide integrating spheres that can accept free-space or fiber-coupled sources, have user-configurable ports, and may be calibrated with user-selected sensors upon request. The modular Raman spectroscopy kit has options for solid or liquid samples in backscattering or right-angle scattering geometries respectively. Our compact CCD spectrometers are fiber compatible and available with 3 different wavelength ranges. We also provide an acoustic detection module for quartz-enhanced photoacoustic spectroscopy.