Device For Amplifying A Laser Beam

Abstract: The present invention relates to a device (10) for amplifying a multi-wavelength laser beam, comprising: a. a gain medium (M) having a front face (20) intended to receive the beam to be amplified on each passage through the gain medium (M), and a reflective rear face (22) that is inclined with respect to the front face (20), the beam reflected by the rear face (22) and refracted by the front face (20) on the n-th passage being called the n-th useful beam, and b. a steering first optical unit (18) placed on the path of the first useful beam (FU1), and configured so as to steer the first useful beam (FU1) to the front face (20) for a second passage through the gain medium (M) in such a way that the sub-beams of each wavelength, forming the second useful beam (FU2), are parallel to one another at the end of the second passage.

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