What is a tunable light source?
A tunable light source is a monochromatic light source whereby the wavelength can be adjusted. The wavelength is selected either using PC software or manually.
For many scientific and industrial applications it is necessary to be able to cover a larger wavelength range with monochromatic light in small steps. This requires a tunable light source. Applications of this nature are, for example, in the field of fluorescence spectroscopy. Tunable light sources are also used to test optical sensors.