A coherent beam recombination system configured to provide an output recombined beam, comprising: - a laser source providing a source beam having a linewidth; - a beam broadener coupled to the laser source and configured to provide a broadened beam having a larger linewidth than the source beam; - a splitter configured to split the broadened beam into a plurality of secondary beams (12A-12D); - a plurality of channels (20A-20D) coupled to the splitter, each channel being configured to receive a respective secondary beam (12A-12D) and to provide a respective intermediate beam (21A-21D), each channel comprising an optical amplifier, a phase modulator, an optical delay line and an opto-mechanical element that provides the respective intermediate beam; - an optical sensor (23, 24) configured to provide a detection signal (INT, IMG) indicative of an intensity of a received optical beam; - a focusing optics configured to receive the intermediate beams (21A-21D), to provide the output recombined beam from a first portion of each intermediate beam, and to provide a sampled recombined beam to the optical sensor from a second portion of each intermediate beam; and - a control unit coupled to the optical sensor and the plurality of channels, wherein the control unit comprises a phase-locking module configured to: - provide a plurality of phase control signals (u 1, u 2, u 3, u 4), each to the phase modulator of a respective channel (20A-20D), - receive the detection signal from the optical sensor, the detection signal being indicative of an intensity of the sampled recombined beam; - calculate a cost function from the detection signal, the cost function being a function of the intensity of the sampled recombined beam; - perform an optimization algorithm of the cost function, the optimization algorithm being configured to maximise the intensity of the sample recombined beam; and - provide a plurality of updated phase control signals, based on a result of the optimization algorithm, characterized in that the coherent beam recombination system further comprises an actuator coupled to the optical sensor and configured to cause a displacement of the optical sensor for steering the output recombined beam. - a laser source providing a source beam having a linewidth; - a beam broadener coupled to the laser source and configured to provide a broadened beam having a larger linewidth than the source beam; - a splitter configured to split the broadened beam into a plurality of secondary beams (12A-12D); - a plurality of channels (20A-20D) coupled to the splitter, each channel being configured to receive a respective secondary beam (12A-12D) and to provide a respective intermediate beam (21A-21D), each channel comprising an optical amplifier, a phase modulator, an optical delay line and an opto-mechanical element that provides the respective intermediate beam; - an optical sensor (23, 24) configured to provide a detection signal (INT, IMG) indicative of an intensity of a received optical beam; - a focusing optics configured to receive the intermediate beams (21A-21D), to provide the output recombined beam from a first portion of each intermediate beam, and to provide a sampled recombined beam to the optical sensor from a second portion of each intermediate beam; and - a control unit coupled to the optical sensor and the plurality of channels, wherein the control unit comprises a phase-locking module configured to: - provide a plurality of phase control signals (u 1, u 2, u 3, u 4), each to the phase modulator of a respective channel (20A-20D), - receive the detection signal from the optical sensor, the detection signal being indicative of an intensity of the sampled recombined beam; - calculate a cost function from the detection signal, the cost function being a function of the intensity of the sampled recombined beam; - perform an optimization algorithm of the cost function, the optimization algorithm being configured to maximise the intensity of the sample recombined beam; and - provide a plurality of updated phase control signals, based on a result of the optimization algorithm, - provide a plurality of phase control signals (u 1, u 2, u 3, u 4), each to the phase modulator of a respective channel (20A-20D), - receive the detection signal from the optical sensor, the detection signal being indicative of an intensity of the sampled recombined beam; - calculate a cost function from the detection signal, the cost function being a function of the intensity of the sampled recombined beam; - perform an optimization algorithm of the cost function, the optimization algorithm being configured to maximise the intensity of the sample recombined beam; and - provide a plurality of updated phase control signals, based on a result of the optimization algorithm, characterized in that the coherent beam recombination system further comprises an actuator coupled to the optical sensor and configured to cause a displacement of the optical sensor for steering the output recombined beam.