MULTIFREQUENCY PULSED LASER EMITTER AND DIFFERENTIAL ABSORPTION LIDAR EMPLOYING SUCH A LASER EMITTER

摘要

The invention relates to a pulsed laser emitter comprising a laser cavity (1) and at least two master lasers (41, 42, 43) sequentially injecting master laser beams into said laser cavity, said laser cavity (1) having a plurality of resonant eigenmodes that are spaced apart spectrally by free spectral ranges, characterised in that the wavelengths of said master lasers (41, 42, 43) are spaced apart spectrally by an integer number of free spectral ranges of said laser cavity (1), and in that said laser emitter comprises first means for controlling the wavelength of said laser cavity (1), said means being able to modify the wavelength of said laser cavity (1) until the wavelength of a resonant eigenmode of said laser cavity (1) corresponds to the wavelengths of the master laser beam injected into the cavity.