Optical fiber is found in several applications in spectroscopy, thanks to its ability to transmit light over long distances with little loss. Optical fiber systems can be used on anything from lasers with a narrow range width to sources with a supercontinuum spectrum.

Optical fiber also offers several advantages as a medium for transporting light:

• Great flexibility in experimental configuration.
• Reduction of external interferences, such as ambient light, allowing for improved spectroscopy sensitivity.
• Electrical isolation, preventing electromagnetic interference in sensitive applications.

Laser spectroscopy has a major impact on the development of new techniques used in various applications in physics, chemistry, biology, and medicine.