Free Space Narrow Linewidth Laser Diodes

Free Space Narrow Linewidth Laser Diodes from the “FRLD-VBG” series that are designed to meet Raman spectroscopy requirements.

Raman spectroscopy is typically used to determine vibrational modes of molecules. It is popular in chemistry to provide a structural fingerprint by which molecules can be identified. The technique is based on inelastic scattering (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 fulfills key performance parameters like a narrow spectral linewidth, a good beam quality and a high and stable output power.

The laser diodes are offered at wavelengths 532 nm, 638 nm, 785 nm, 808 nm, 830 nm, 976 nm, and 1064 nm, and with an output power up to 800 mW. The spectral linewidth is very narrow (typically less than 0.1 nm) due to an integrated Volume Bragg Grating (VBG) and. 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 laser diodes are packaged in a solid Butterfly package with a free space output. An integrated thermo-electric cooler (TEC) is optionally available.

Frankfurt Laser Company
An den 30 Morgen 13
61381 Friedrichsdorf, Germany
Phone: +49 (0)6172 27978-0
Fax: +49 (0)6172 27978-10