FLC offers Free Space Narrow Linewidth Laser Diodes designed to meet Raman spectroscopy requirements. Raman spectroscopy is a spectroscopic technique typically used to determine vibrational modes of molecules. It is commonly used in chemistry to provide a structural fingerprint by which molecules can be identified. It is based on inelastic scattering (or Raman scattering) of monochromatic light at wavelengths typical in the visible range or in the IR range. This light is usually generated using a laser which fulfils key performance parameters like a narrow spectral linewidth, a good beam quality and a high and stable output power. The FLC laser diodes from the FRLD-VBG series are excellent suited as light source for this application. They are offered at wavelengths 638nm, 785nm, 808nm, 830nm, 976nm & 1064nm and with an output power up to 800mW. The spectral linewidth is very narrow due to an integrated Volume Bragg Grating (VBG) and typically less than 0.1nm. Careful thermomechanical control and high-precision alignment inside the laser is important to achieve high stability in the output wavelength and linewidth, especially when operating the laser at varying ambient temperatures. The FRLD-VBG series laser diodes are packaged in a solid Butterfly package with a free space output. An integrated thermo-electric cooler (TEC) is optionally available.
Without a doubt, Raman spectroscopy continues to be a cutting-edge analytical technique that will likely continue to be applied in even more industries and markets in the future. Systems are shrinking, resolution and sensitivity is increasing, and components are becoming more reliable. Understanding the influence of the lasers performance is critical to the continued success within these new application areas. FLC will be pleased to support you finding the best suitable solution.