| 摘要 |
The invention relates to a fiber optic power laser device comprising a power laser diode (1) emitting a pump wave, an optical resonator (12) comprising a totally reflecting end (6) and a partially reflecting end (9), an amplifying multimode optic fiber (7) and optical means (3, 11) coupling said pump wave in the multimode optical fiber (7). According to the invention, the optical resonator (12) comprises at least one optical sub-module (25, 26) consisting of a spatial filtering means and comprising optical means (2, 8) having a specific position in the optical sub-module (25, 26) so as to make the optical sub-module able to reproduce in amplitude and phase, after a round trip of the laser beam in said sub-module, the fundamental mode of the multimode optical fiber (7) on the input or output face (23, 24) of said multimode optical fiber (7), minimizing the losses of the fundamental mode, and so as to make the optical sub-module capable of filtering the other modes by producing in the optical resonator additional losses on said modes, minimizing the number of laser modes being propagated in the optical resonator. |
