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glossary

Laser: acronym of : « light amplification by stimulated emission of radiation » ; device emitting spatially and temporally coherent light radiation based on the stimulated emission
Longitudinal mode: resonnant wavelength or frequency of a laser or a Fabry Perot interferometer
Free spectral range ( Fabry Perot ): distance between two consecutive longitudinal modes
Mode lock: in a laser, longitudinal modes synchronization enabling short pulses emission